2D Materials

Overview| Current projects| People| Resources| Publications

LATEST NEWS

April 2022: Our new paper on transition metal dichalcogenide dimer nano-antennas for tailored light–matter interactions has appeared in ACS Nano! Congratulations to Panaiot who was at the centre of this project! New important collaborations which we will take further are with Dr Yue (Christina) Wang from York whose contribution is in fabrication of advanced nano-photonic structures. Very important collaborations in Sheffield include Nic Mullin and Jamie Hobbs, helping this work with advanced AFM techniques. See a copy of the manuscript here.

April 2022: A new postdoctoral researcher Dr Paul Bouteyre has joined the group this month. Paul will work on advanced optical characterisation and design of atomically thin van der Waals heterostructures and nano-photonic structures made from layered materials. Paul is funded by the EPSRC Programme Grant grant.

March 2022: A new postdoctoral researcher Dr Xuerong Hu has joined the group this month. Xuerong will work on a wide range of fabrication projects of atomically thin van der Waals heterostructures and nano-photonics. Xuerong is funded by the EPSRC Programme Grant grant.

November 2021 fully funded PhD projects: Several PhD projects are available in the group. See the description at FindAPhD. Send inquiries through FindAPhD or directly to a.tartakovskii@sheffield.ac.uk.

November 2021: A new postdoctoral researcher Dr Yadong Wang is arriving in the group this month. Yadong will work on atomically thin van der Waals heterostructures and near-field optical spectroscopy using a new Neaspec instrument arriving in January 2022. Yadong is funded by the EPSRC Twistronics grant.

October 2021: Our new paper on bright single photon emitters in monolayer WSe2 coupled to nano-antennas has appeared in Nature Communications! Congratulations to Luca and Panaiot who drove this research for a long time with a few successes on the way (also in Nature Communications and ACS Photonics). Thanks to Sheffield’s collaborators Catherine, Alistair and Prof Mark Fox, as well as external collaborators from Imperial and LMU Munich. See a copy of the manuscript here.

September 2021: A new PhD student Sam Randerson has joined the group. Sam will work on nano-photonics with layered materials and near-field optical spectroscopy on a new Neaspec instrument arriving in January 2022.

September 2021 two new postdoc positions in the group: Two 30 month Postdoctoral Research Associate positions in fabrication and optics of 2D materials are available in the group. The closing date is 15th of November 2021. See further details at jobs.ac.uk.

May 2021 new Scientific Officer position: This Scientific Officer post arises from a large capital equipment grant designed to establish and run the interdisciplinary Near-Field Optical Spectroscopy Centre in Sheffield . The initial funding for this post is 36 months. However, the Scientific Officer position is essential for the successful operation of the Centre in the future, and funding will be sought to support this post beyond the initial 36 months. The closing date is the 14th of June 2021. See further details at jobs.ac.uk and in this advert. The Scientific Officer (SO) will be central to the smooth operation of the experimental set-up, and will become a leading expert in these pioneering techniques, consolidating on the existing near-field optical spectroscopy methods as well as pushing the technological boundaries and developing new bespoke experimental and data analysis methods. Send inquiries to a.tartakovskii@sheffield.ac.uk or apply at www.sheffield.ac.uk/jobs, job reference UOS028522.

April 2021 new postdoc position: A 30 month Postdoctoral Research Associate in Twistronics post is available in the group with the closing date of 21st of May 2021. See further details at jobs.ac.uk and in this advert. This post arises from a joint project between the University of Sheffield and the University of Manchester on Twistronics, a revolutionary approach for creating ‘designer’ materials. In this approach, a wide variety of properties in few-atom-thick materials can be controlled by the relative rotation (twist) between the adjacent atomic layers, a unique feature available only in 2D materials. Further advances will be made to couple such materials to various photonic devices, which will be designed and fabricated in this project. Send inquiries to a.tartakovskii@sheffield.ac.uk or apply at www.sheffield.ac.uk/jobs, job reference UOS028193.

November 2020: Our first paper on atomically thin magnetic materials has been published in Nature Communications! Its title is ‘Interplay between spin proximity effect and charge-dependent exciton dynamics in MoSe2/CrBr3 van der Waals heterostructures’. Congratulations to Tom and Dan! This is collaboration between Sheffield, Manchester, Exeter (including their Extremag facility, where we were the first users!), International Iberian Nanotechnology Laboratory, and Tsukuba. See a copy of the manuscript here.

November 2020: Our new paper on ‘Strong exciton-photon coupling in large area MoSe2 and WSe2 heterostructures fabricated from two-dimensional materials grown by chemical vapor deposition’ has been published in IoP 2D Materials. Congratulations to Dan, Armando, Tom and Toby! This is collaboration between Sheffield, UNIST and Oxford. Important internal collaboration with the organic optoelectronic devices group of Prof David Lidezey in Sheffield too. See a copy of the manuscript here.

October 2020: A Tartakovskii was awarded a new £420k EPSRC grant to work on Quantum Materials by Twistronicse. This is part of a £1.7M joint grant with the University of Manchester led by Profs R Gorbachev, S Haigh and V Falko.

September 2020: Our new paper on ‘Emergence of Highly Linearly Polarized Interlayer Exciton Emission in MoSe2/WSe2 Heterobilayers with Transfer-Induced Layer Corrugation’ has been published in ACS Nano. Congratulations to Evgeny, Oleksandr and Tillmann! This is collaboration between Sheffield and Manchester. Important collaboration with the scanning probe analysis group of Prof Jamie Hobbs in Sheffield too. See a copy of the manuscript here.

August 2020: A Tartakovskii was awarded a new £1.6M EPSRC Strategic Equipment grant for Near-Field Optical Spectroscopy Centre. This centre will make available truly non-invasive techniques relying on weak optical probes. A new research facility based on such an instrument will enable a unique suite of novel optical techniques capable of 10 nm spatial resolution, 50 to 1000 times below the optical diffraction limit. The techniques are based on the light focusing with a very sharp tip, used in atomic force microscopy (AFM). See further information on such instruments here.

August 2020: Our new paper on ‘Dielectric Nanoantennas for Strain Engineering in Atomically Thin Two-Dimensional Semiconductors’ has been published in ACS Photonics. Congratulations to Luca, Panaiot and Armando! This is collaboration between Sheffield, Imperial, Konstanz and LMU Munich. See a copy of the manuscript here.

May 2020: Our new paper on ‘Large area chemical vapour deposition grown transition metal dichalcogenide monolayers automatically characterized through photoluminescence imaging’ is npj 2D Materials and Applications. Congratulations to Toby, Armando, Evgeny and Sam who contributed a lot to this technical development. This is collaboration between Sheffield and UNIST (Ulsan, Korea). See the Open Access manuscript here.

May 2020: Our new paper on ‘Electrically pumped WSe2-based light-emitting van der Waals heterostructures embedded in monolithic dielectric microcavities’ is published in IoP 2D Materials. A lot of previous members contributed to this work, that was finished by Armando. Congratulations! This work is primarily result of collaboration between Sheffield and Manchester. See the Open Access manuscript here.

April 2020: We posted our four new papers on arxiv.org. Two will soon appear in press in IoP 2D Materials and npj 2D Materials and Applications.

November 2019: Our new paper on ‘Enhanced light-matter interaction in an atomically thin semiconductor coupled with dielectric nano-antennas’ is published in Nature Communications. Congratulations to Luca and Panaiot who put a lot of effort in this work. This is collaboration between Sheffield, Imperial, Dortmund and LMU Munich. See the Open Access manuscript here.

Luca just after his viva with the cryogenic micro-PL system he assembled from scratch during his PhD.

October 2019: Congratulations to Luca Sortino for successful defence of his PhD thesis!

October 2019: A new PhD student Oscar Hutchings has just joined our group.

September 2019: Kick-off meeting in Dortmund for our EPSRC Centre-to-Centre project with Prof Manfred Bayer’s group.

During the visit of one of the many optical spectroscopy laboratories in Dortmund. Left to right: Sasha Tartakovskii, Dima Krizhanovskii, Manfred Bayer, Mark Fox

September 2019: Congratulations to Tom Lyons for successful defence of his PhD thesis. Well done!

Tom just before his viva on 24th September 2019.

August 2019: Evgeny Alexeev in collaboration with Ossila Ltd has developed a guide for ‘Viscoelastic Transfer of 2D Material Using PDMS’. See the accompanying video and the step-by-step description on Ossila’s web-site.

July 2019: We have been awarded an EPSRC Centre-to-Centre grant of £1.4 million to initiate collaborative research into light-matter interactions in quantum nano-materials with the Technical University of Dortmund with the centre led by Professor Manfred Bayer. See University’s press-release here. Postdoc position openings will follow soon, including a position to work on 2D materials.

July 2019: Congratulations to Alessandro Catanzaro for successful defence of his PhD thesis. Well done!

Alessandro after the successful defence of his PhD thesis 25 July 2019.

May 2019: Our new paper on ‘The valley Zeeman effect in inter- and intra-valley trions in monolayer WSe2’ is published in Nature Communications. This is collaboration between Sheffield, Konstanz, Manchester, Exeter and NIMS. Congratulations to Tom Lyons who was the main drive behind this work! See the Open Access manuscript here.

March 2019: Our latest paper just appeared in Nature: access full text here. We report on how two monolayer TMDs hybridize when stacked, role of the moire pattern in the atomic registry, and importantly how all of these are controlled by the twist between the layers. The paper is on the Nature web-site. Our paper, and several other studies published last week are also accompanied with a News and Views article.

November 2018: Our new paper on ‘Valley coherent exciton-polaritons in a monolayer semiconductor’ is published in Nature Communications. This is collaboration between Sheffield, Clermont-Ferrand, Oxford and Manchester. See the Open Access manuscript here.

See more in the news archive below.

 

OVERVIEW

Open cavity set-up

Stefan Schwarz aligning the open cavity set-up.

The isolation of single-atomic layer graphene has led to a surge of interest in other layered crystals with strong in-plane bonds and weak, van der Waals-like, interlayer coupling. Here we research new properties of two-dimensional materials extracted from their layered bulk crystals. We published work on MoS2, MoSe2, WSe2, WS2, CrBr3, GaSe, GaTe, InSe and heterostructures made from some of these materials. In their bulk form layered materials may vary from insulators to semiconductors, from metals to superconductors, and exhibit topological insulator properties. We obtain 2D films by mechanical exfoliation from such layered crystals, often referred to as van der Waals crystals to describe the weak forces holding their atomic planes together. The properties of 2D films may differ from the bulk quite dramatically. For example, some indirect band-gap semiconductors turn to direct band-gap ones and become optically active. Our recent effort is on development of hybrid photonic devices comprising these 2D films and artificially built van der Waals heterostructures consisting of atomically thin layers of various materials.

 

CURRENT PROJECTS (November 2021)

Sub-wavelength all-dielectric nano-photonics

So far nano-photonics has dealt with dielectric devices relying on confining light in diffraction-limited volumes. Beating the diffraction limit by confining light on sub-wavelength scales has been only possible with plasmonic structures made of nano-structured metal, which unavoidably suffer from large optical losses. Recently, it has been shown that high-refractive-index dielectric nano-antennas can provide confined optical modes with sub-wavelength mode volumes. In contrast to plasmonic devices, such structures show negligible non-radiative losses. Our research group has shown that by coupling such antennas to atomically thin 2D semiconductors – transition metal dichalcogenides (TMDs), strong fluorescence enhancements in the latter can be observed ( see our paper in Nature Communications). In this project we are expanding the nano-photonics ‘tool-box’ by studying unexplored materials systems and realising innovative approaches for a new generation of dielectric nano-antennas and their coupling to various fluorescent materials.

Optical manifestations of the quantum physics of moiré superlattices in van der Waals heterostructures

Atomically-thin layers of two-dimensional materials can be assembled in vertical stacks (called ‘heterostructures’), which are held together by relatively weak van der Waals forces, allowing for coupling between monolayer crystals with incommensurate lattices and arbitrary mutual rotation, or ‘twist’. The twist is a new degree of freedom recently discovered in 2D materials and now widely used in the design of 2D heterostructures. It leads to a new in-plane periodicity in the local atomic registry of the constituent crystal structures, known as a moiré superlattice. The moiré superlattice has a dramatic effect on the motion of electrons in the plane of the 2D structure. For example, when two monolayers of graphene are attached to each other with a ‘magic twist angle’ a superconductor-insulator transition is observed. Similarly, in 2D semiconductors, the twist has been shown to lead to a variety of unusual optical phenomena as we reported in our recent work in Nature. In this project, this new degree of freedom will be explored in a variety of layered materials and new phenomena and physics will be discovered.

Strong light-matter interaction in van der Waals 2D materials

Here we focus on studies of the strong light-matter interaction in 2D materials embedded in optical microcavities and coupled to various photonic structures. New states of the matter, exciton-polaritons emerge in these structures, which provide a particularly rich phenomenology in atomically thin transition metal dichalcogenides (TMDs), as we have shown in our recent papers in Nature Photonics ( https://www.nature.com/articles/nphoton.2017.125) and Nature Communications (https://www.nature.com/articles/ncomms9579, https://www.nature.com/articles/s41467-018-07249-z). Further unexplored strong-coupling phenomena, for example in high density electron gas in the extreme 2D limit will be studied in this project opening unprecedented possibilities to explore new non-linear optical phenomena and device applications.

Nano-magnetism in atomically thin 2D quantum materials and their heterostructures

In a large family of layered crystals the properties range from superconductors and metals, to semiconductors and insulators. Properties of such quantum materials in a few-atomic-layer form are strongly influenced by the quantum confinement of the electronic excitations due to the extreme crystal thinness. Surprisingly, a family of layered ferromagnetic materials exists, which preserve their ferromagnetic properties even in an atomic monolayer form. Such 2D materials will revolutionise electronics, memory devices, and will have broad applications in quantum technologies, particularly in combination with other layered semiconductors. In this PhD project you will discover novel magnetic few-atomic-layer materials, work on advancing their fabrication, and will develop methods for combining such materials with other 2D monolayer crystals such as transition metal dichalcogenides (TMDs). The goal is to fabricate and explore novel types of opto-electronic devices taking advantage of various magnetic proximity effects generated by 2D magnetic materials on the nano-scale, as was recently showed in our work in Nature Communications .

 

PEOPLE

The group is led by Prof Sasha Tartakovskii. In December 2021 the group consists of 4 postdocs Panaiot Zotev, Daniel Gillard, Yadong Wang, Alexander Knight (with two more arriving in early 2022), and 3 PhD students Charalambos Louca, Oscar Hutchings, Sam Randerson, Lab Assistant Ye Cao, and two Master students Dominic Hensman and Sharada Nagarkar. 14 PhD students graduated since 2008, now based in industry and academia in Europe (UK, Ireland, Germany), North America (Mexico) and Asia (Japan).

See Sasha Tartakovskii’s cv (2019).

Information on other members of the group can be found on the Inorganic Semiconductors Group (or LDSD) member web-pages and below.

Alexander Tartakovskii

Alexander Tartakovskii, group leader
PhD: Institute of Solid State Physics (Chernogolovka)
Undergraduate/Masters: Moscow Institute of Physics and Technology

Postdoctoral researchers (alphabetic order)

Paul Bouteyre

Paul Bouteyre, postdoctoral researcher
PhD: ENS Paris-Saclay
Undergraduate/Masters: Grenoble INP – Phelma

Daniel Gillard

Daniel Gillard, postdoctoral researcher
PhD: Sheffield
Undergraduate/Masters: Sheffield

Xuerong Hu

Xuerong Hu, postdoctoral researcher
PhD: Aalto (Finland) & Northwest University (China)
Undergraduate/Masters: Northwest University

Alexander Knight

Alexander Knight, postdoctoral researcher, Scientific Officer
PhD: Oxford
Undergraduate/Masters: Oxford

Yadong Wang

Yadong Wang, postdoctoral researcher
PhD: Aalto (Finland) & Northwestern Polytechnical University (China)
Undergraduate/Masters: Northwestern Polytechnical University

Panaiot Zotev

Panaiot Zotev, postdoctoral researcher
PhD: Sheffield
Masters: TU Munich
Undergraduate: University of Virginia

PhD students (alphabetic order)

Oscar Hutchings

Oscar Hutchings, PhD student
Undergraduate/Masters: Nottingham

Charalambos Louce

Charalambos Louca, PhD student
Masters: Sheffield
Undergraduate: Durham

Sam Randerson

Sam Randerson, PhD student
Undergraduate/Masters: Sheffield

Master students

Dominic Hensman

Dominic Hensman, Masters student
Undergraduate: Sheffield
Masters: Sheffield

Sharada Nagarkar

Sharada Nagarkar, Masters student
Undergraduate: University of Pune (India)
Masters: Sheffield

Lab assistant

Ye Cao

Ye Cao, Laboratory Assistant
Undergraduate: Nanjing Tech University (China) & Sheffield;
Masters: Imperial College London

Former members (PhD and postdocs, in chronological order with most recent destinations):

Thomas Lyons (RIKEN, Japan), Armando Genco (Politecnic di Milano, Italy), Luca Sortino (LMU, Germany), Alessandro Catanzaro (NPL), Toby Severs Millard (Imperial College London), Evgeny Alexeev (Cambridge University), Oleksandr Skrypka (Ukraine), Scott Dufferwiel (Aegic), Robert Schofield (NPL), Osvaldo Del Pozo Zamudio (Universidad Autónoma de San Luis Potosí, Mexico), Stefan Schwarz (Bernard Technologies GmbH, Germany), Tilmann Godde (Opsira GmbH, Germany), Jorge Puebla (RIKEN, Japan), Daniel Sercombe (Intel, Ireland)

Glovebox training June 2022

After the training session for the newly installed glovebox, June 2022. Left to right: Yadong, Xuerong, Charalambos, Paul

Picnic 22 July 2020

First face to face group meeting after the lockdown on 22 July 2020 on the day when the labs in Hicks building were finally open. Left to right: Charalambos, Daniel, Na, Sasha, Luca, Oscar, Panaiot, Tom, Mostafa and Armando.

Zoom group meeting

Group meeting in July 2020

Lab photo January 2019

Lab photo January 2019. Left to right: top – Evgeny, Armando, middle – Sasha, Luca, Alessandro, Panaiot, bottom – Tom, Dan, Charalambos.

Group photo January 2019

Group photo in January 2019. Left to right: Luca, Dan, Armando, Evgeny, Tom, Charalambos, Sasha, Alessandro

Historical picture, outside the lab on a sunny day: Sasha, Hakan, Osvaldo, Tillmann, Robert, Le, Stefan


Historical picture from 2014, outside the lab on a sunny day: Sasha, Hakan, Osvaldo, Tillmann, Robert, Le, Stefan

 

RESOURCES

Our expertise is in photonics and magneto-optics of nano-structured semiconductors. The group occupies three dedicated high-spec optical laboratories (including a state-of-the-art magneto-optics and Raman set-up), and shares access to several other state-of-the-art optics laboratories in the LDSD group. Several of our set-ups are quite unique, even among the world leading optics groups. For example, we have a tunable Fabri-Perot microcavity set-up installed in a vector magnetic field cryostat where 4.5T can be rotated in 2D plane. This cryostat also has 9T maximum vertical magnetic field. Other advanced set-ups cover our effort in micro-photoluminescence and micro-Raman, with the Raman set-up allowing temperatures down to 4K and ultra-low frequencies to 10 cm-1. We have developed dark field spectroscopy, which we extended to near-infrared (NIR), where in addition to standard (super-low-noise) CCDs we now also operate a nitrogen cooled InGaAs detector array (allowing to do spectroscopy up to wavelengths of 1.7 micron).

Very importantly, in 2021 we will receive a delivery of a near-field optical spectroscopy set-up, that will allow optical spectroscopy at any wavelength with a spatial resolution of 10-20 nm. This massive expansion of our spectroscopy capabilities arises from a large capital equipment grant designed to establish and run the interdisciplinary Near-Field Optical Spectroscopy Centre (NOSC) in Sheffield (https://gow.epsrc.ukri.org/NGBOViewGrant.aspx?GrantRef=EP/V007696/1). This Centre will provide a unique capability in Europe in pioneering optical nano-spectroscopy for physicists, chemists, biologists and engineers. The novel optical nano-spectroscopy techniques will be based on measuring the scattered and emitted light from a sample with 10 nm spatial resolution. This deep sub-diffraction resolution is achieved by focusing light on the sample with a tip of an Atomic Force Microscope, and then through analysis of the signal via various interferometric techniques. We expect that the facility will be used by many researchers from Sheffield and other universities and industry in the UK, and will facilitate in delivering transformative research and development programmes encompassing the themes of Energy, Advanced Materials, Healthcare Technologies, Life Sciences, Photonics, Quantum Technologies etc.

Going back to 2D materials, we have established a fabrication station for making atomically thin flakes and heterostructures. Additionally, we have access to the clean room and electron beam lithography facility at the III-V Epitaxy Facility in Sheffield, with whom we closely collaborate.

New lab

Equipment has just been moved in the new lab in May 2016. The Attocube cryostat with a vector magnet (9T vertical and 4.5T rotated in the vertical plane) houses our unique cryogenic scanning microcavity set-up.

Scott in the new lab

Scott Dufferwiel is working on a set-up combining a vector magnet and a scanning microcavity. June 2016.

Microscope in the new lab

Microscope for flake search installed in one of the labs. Three more high-resolution microscopes are available in the group for fabrication of 2D material structures and dark field spectroscopy useful for fast and accurate characterisation of nano-photonic structures.

Two microscopes in one of the labs used for sample fabrication and for characterisation of nano-photonic devices.

Set-up for cryogenic ultra-low frequency Raman spectroscopy uniquely designed for studies of magnetic and superconducting layered and atomically thin materials. Oscar Hutchings is aligning the set-up. Autumn 2020.

A typical micro-photoluminescence and micro-reflectance set-up for spectroscopy from cryogenic to room temperature, a work-horse of our experiments replicated in several labs.

 

PUBLICATIONS

List of publications in 2010-2022

2022

P. G. Zotev, Yue Wang, L. Sortino, T. Severs Millard, N. Mullin, D. Conteduca, M. Shagar, A. Genco, J. K. Hobbs, T. F. Krauss, A. I. Tartakovskii, “Transition Metal Dichalcogenide Dimer Nanoantennas for Tailored Light–Matter Interactions”, ACS NANO 16, 6493 (2022).

2021

Luca Sortino, Panaiot G. Zotev, Catherine L. Phillips, Alistair J. Brash, Javier Cambiasso, Elena Marensi, A. Mark Fox, Stefan A. Maier, Riccardo Sapienza & Alexander I. Tartakovskii, “Bright single photon emitters with enhanced quantum efficiency in a two-dimensional semiconductor coupled with dielectric nano-antennas”, NATURE COMMUNICATIONS 12, 6063 (2021).

V. Kravtsov, A. D. Liubomirov, R. V. Cherbunin, A. Catanzaro, A. Genco, D. Gillard, E. M. Alexeev, T. Ivanova, E. Khestanova, I. A. Shelykh, A. I. Tartakovskii, M. S. Skolnick, D. N. Krizhanovskii, I. V. Iorsh, “Spin–valley dynamics in alloy-based transition metal dichalcogenide heterobilayers”, 2D MATERIALS 8, 025011 (2021).

D. J. Gillard, A. Genco, S. Ahn, T. P. Lyons, K. Yeol Ma, A-Rang Jang, T. Severs Millard, A. A. P. Trichet, R. Jayaprakash, K. Georgiou, D. G. Lidzey, J. M. Smith, H. S. Shin, A. I. Tartakovskii, “Strong exciton-photon coupling in large area MoSe2 and WSe2 heterostructures fabricated from two-dimensional materials grown by chemical vapor deposition”, 2D MATERIALS 8, 011002 (2021).

2020

T. P. Lyons, D. Gillard, A. Molina-Sánchez, A. Misra, F. Withers, P. S. Keatley, A. Kozikov, T. Taniguchi, K. Watanabe, K. S. Novoselov, J. Fernández-Rossier, A. I. Tartakovskii, “Interplay between spin proximity effect and charge-dependent exciton dynamics in MoSe2/CrBr3 van der Waals heterostructures”, NATURE COMMUNICATIONS 11, 6021 (2020).

E. M. Alexeev, N. Mullin, P. Ares, H. Nevison-Andrews, O. Skrypka, T. Godde, A. Kozikov, L. Hague, Y. Wang, K. S. Novoselov, L. Fumagalli, J. K. Hobbs, A. I. Tartakovskii, “Emergence of Highly Linearly Polarized Interlayer Exciton Emission in MoSe2/WSe2 Heterobilayers with Transfer-Induced Layer Corrugation”, ASC NANO 14, 9, 11110 (2020).

L. Sortino, M. Brooks, P. G. Zotev, A. Genco, J. Cambiasso, S. Mignuzzi, S. A. Maier, G. Burkard, R. Sapienza, A. I. Tartakovskii, “Dielectric Nanoantennas for Strain Engineering in Atomically Thin Two-Dimensional Semiconductors”, ACS PHOTONICS 7, 9, 2413 (2020).

R. P. A. Emmanuele, M. Sich, O. Kyriienko, V. Shahnazaryan, F. Withers, A. Catanzaro, P. M. Walker, F. A. Benimetskiy, M. S. Skolnick, A. I. Tartakovskii, I. A. Shelykh & D. N. Krizhanovskii, “Highly nonlinear trion-polaritons in a monolayer semiconductor”, NATURE COMMUNICATIONS 11, 3589 (2020).

O. Del Pozo-Zamudio, A. Genco, S. Schwarz, F. Withers, P. M. Walker, T. Godde, R. C. Schofield, A. P. Rooney, E. Prestat, K. Watanabe, T. Taniguchi, C. Clark, S. J. Haigh, D. N. Krizhanovskii, K. S. Novoselov, A. I. Tartakovskii, “Electrically pumped WSe2-based light-emitting van der Waals heterostructures embedded in monolithic dielectric microcavities”, 2D MATERIALS 7, 031006 (2020).

A. Tartakovskii, “Moire or not”, News and Views, NATURE MATERIALS 19, 581 (2020).

T. Severs Millard, A. Genco, E. M. Alexeev, S. Randerson, S. Ahn, A-R. Jang, H. S. Shin, A. I. Tartakovskii, “Large area chemical vapour deposition grown transition metal dichalcogenide monolayers automatically characterized through photoluminescence imaging”, NPJ 2D MATERIALS AND APPLICATIONS 4, 12 (2020).

D. Polak, R. Jayaprakash, T. P. Lyons, L. Á. Martínez-Martínez, A. Leventis, K. J. Fallon, H. Coulthard, D. G. Bossanyi, K. Georgiou, A. J. Petty, J. Anthony, H. Bronstein, J. Yuen-Zhou, A. I. Tartakovskii, J. Clark, A. J. Musser, “Manipulating molecules with strong coupling: harvesting triplet excitons in organic exciton microcavities”, CHEMICAL SCIENCE 11, 343-354 (2020).

V. Kravtsov, E. Khestanova, F. A. Benimetskiy, T. Ivanova, A. K. Samusev, I. S. Sinev, D. Pidgayko, A. M. Mozharov, I. S. Mukhin, M. S. Lozhkin, Y. V. Kapitonov, A. S. Brichkin, V. D. Kulakovskii, I. A. Shelykh, A. I. Tartakovskii, P. M. Walker, M. S. Skolnick, D. N. Krizhanovskii, I. V. Iorsh, “Nonlinear polaritons in a monolayer semiconductor coupled to optical bound states in the continuum”, LIGHT: SCIENCE & APPLICATIONS 9, 56 (2020).

2019

F. A. Benimetskiy, V. A. Sharov, P. A. Alekseev, V. Kravtsov, K. B. Agapev, I. S. Sinev, I. S. Mukhin, A. Catanzaro, R. G. Polozkov, E. M. Alexeev, A. I. Tartakovskii, A. K. Samusev, M. S. Skolnick, D. N. Krizhanovskii, I. A. Shelykh, I. V. Iorsh, “Measurement of local optomechanical properties of a direct bandgap 2D semiconductor”, APL MATERIALS 7, 101126 (2019).

L. Sortino, P. G. Zotev, S. Mignuzzi, J. Cambiasso, D. Schmidt, A. Genco, M. Aßmann, M. Bayer, S. A. Maier, R. Sapienza, A. I. Tartakovskii, “Enhanced light-matter interaction in an atomically thin semiconductor coupled with dielectric nano-antennas”, NATURE COMMUNICATIONS 10, 5119 (2019).

B. G. Freestone, J. A. Smith, G. Piana, R. C. Kilbride, A. J. Parnell, L. Sortino, D. M. Coles, O. B. Ball, N. Martsinovich, C. J. Thompson, T. I. Alanazi, O. S. Game, A. I. Tartakovskii, P. Lagoudakis, D. G. Lidzey, “Low-dimensional emissive states in non-stoichiometric methylammonium lead halide perovskites”, JOURNAL OF MATERIALS CHEMISTRY A 7, 11104 (2019).

T. P. Lyons, S. Dufferwiel, M. Brooks, F. Withers, T. Taniguchi, K. Watanabe, K. S. Novoselov, G. Burkard & A. I. Tartakovskii, “The valley Zeeman effect in inter- and intra-valley trions in monolayer WSe2”, NATURE COMMUNICATIONS 10, 2330 (2019).

E. M. Alexeev, D. A. Ruiz-Tijerina, M. Danovich, M. J. Hamer, D. J. Terry, P. K. Nayak, S. Ahn, S. Pak, J. Lee, J. I. Sohn, M. R. Molas, M. Koperski, K. Watanabe, T. Taniguchi, K. S. Novoselov, R. V. Gorbachev, H. S. Shin, V. I. Fal’ko & A. I. Tartakovskii, “Resonantly hybridized excitons in moiré superlattices in van der Waals heterostructures”, NATURE 567, 81 (2019).

2018

S. Dufferwiel, T. P. Lyons, D. D. Solnyshkov, A. A. P. Trichet, A. Catanzaro, F. Withers, G. Malpuech, J. M. Smith, K. S. Novoselov, M. S. Skolnick, D. N. Krizhanovskii & A. I. Tartakovskii, “Valley coherent exciton-polaritons in a monolayer semiconductor”, NATURE COMMUNICATIONS 9, 4797 (2018).

2017

M.-E. Kleemann, R. Chikkaraddy, E. M. Alexeev, D. Kos, C. Carnegie, W. Deacon, A. Casalis de Pury, C. Große, B. de Nijs, J. Mertens, A. I. Tartakovskii, J. J. Baumberg, “Strong-coupling of WSe2 in ultra-compact plasmonic nanocavities at room temperature“, NATURE COMMUNICATIONS 8, 1296 (2017).

S. Dufferwiel, T. P. Lyons, D. D. Solnyshkov, A. A. P. Trichet, F. Withers, S. Schwarz, G. Malpuech, J. M. Smith, K. S. Novoselov, M. S. Skolnick, D. N. Krizhanovskii, A. I. Tartakovskii, “Valley addressable exciton-polaritons in atomically thin semiconductors”, NATURE PHOTONICS 11, 497 (2017).

P. Tonndorf, O. Del Pozo-Zamudio, N. Gruhler, J. Kern, R. Schmidt, A. I. Dmitriev, A. P. Bakhtinov, A. I. Tartakovskii, W. Pernice, S. Michaelis de Vasconcellos, R. Bratschitsch “On-Chip Waveguide Coupling of a Layered Semiconductor Single-Photon Source”, NANO LETTERS, 17, 5446 (2017).

E. M. Alexeev, A. Catanzaro, O. V. Skrypka, P. K. Nayak, S. Ahn, S. Pak, J. Lee, J. I. Sohn, K. S. Novoselov, H. S. Shin , A. I. Tartakovskii “Imaging of Interlayer Coupling in van der Waals Heterostructures Using a Bright-Field Optical Microscope”, NANO LETTERS, 17, 5342 (2017).

O. Del Pozo-Zamudio, J. Puebla, A. Krysa, R. Toro, A. M. Sanchez, R. Beanland, A. I. Tartakovskii, M. S. Skolnick, E. A. Chekhovich, “Metalorganic vapor phase epitaxy growth, transmission electron microscopy, and magneto-optical spectroscopy of individual InAsP/GaInP quantum dots”, PHYS. REV. MATERIALS 1, 034605 (2017).

L. Scarpelli, F. Masia, E. M. Alexeev, F. Withers, A. I. Tartakovskii, K. S. Novoselov, and W. Langbein, “Resonantly excited exciton dynamics in two-dimensional MoSe2 monolayers”, PHYSICAL REVIEW B 96, 045407 (2017).

P. Tonndorf, S. Schwarz, J. Kern, I. Niehues, O. Del Pozo Zamudio, A. Dmitriev, A. Bakhtinov, D. Borisenko, N. Kolesnikov, A. I. Tartakovskii, S. Michaelis de Vasconcellos, R. Bratschitsch, “Single-photon emitters in GaSe”, 2D MATERIALS 4, 2 (2017).

2016

T. Godde, D. Schmidt, J. Schmutzler, M. Aßmann, J. Debus, F. Withers, E. M. Alexeev, O. Del Pozo-Zamudio, O. V. Skrypka, K. S. Novoselov, M. Bayer, A. I. Tartakovskii, “Exciton and trion dynamics in atomically thin MoSe2 and WSe2: Effect of localization”, PHYSICAL REVIEW B 94, 165301 (2016).

S. Schwarz, A. Kozikov, F. Withers, J. K. Maguire, A. P. Foster, S. Dufferwiel, L. Hague, M. N. Makhonin, L. R. Wilson, A. K. Geim, K. S. Novoselov, A. I. Tartakovskii, “Electrically pumped single-defect light emitters in WSe2”, 2D MATERIALS, 3, 025038 (2016).

A. Waeber, M. Hopkinson, I. Farrer, D. A. Ritchie, J. Nilsson, R. M. Stevenson, A. J. Bennett, A. J. Shields, G. Burkard, A. I. Tartakovskii, M. S. Skolnick, E. A. Chekhovich, “Few-second-long correlation times in a quantum dot nuclear spin bath probed by frequency-comb nuclear magnetic resonance spectroscopy”, NATURE PHYSICS 12, 688 (2016).

A. Ulhaq, Q. Duan, E. Zallo, F. Ding, O. G. Schmidt, A. I. Tartakovskii, M. S. Skolnick, and E. A. Chekhovich, “Vanishing electron g factor and long-lived nuclear spin polarization in weakly strained nanohole-filled GaAs/AlGaAs quantum dots”, PHYSICAL REVIEW B 93, 165306 (2016).

2015

F. Withers, O. Del Pozo-Zamudio, S. Schwarz, S. Dufferwie, P. M. Walker, T. Godde, A. P. Rooney, A. Gholinia, C. R. Woods, P. Blake, S. J. Haigh, K. Watanabe, T. Taniguchi, I. L. Aleiner, A. K. Geim, V. I. Fal’ko, A. I. Tartakovskii, K. S. Novoselov, “WSe2 Light-Emitting Tunneling Transistors with Enhanced Brightness at Room Temperature”, NANO LETTERS, 15, 8223 (2015).

S. Dufferwiel, S. Schwarz, F. Withers, A. A. P. Trichet, F. Li, M. Sich, O. Del Pozo-Zamudio, C. Clark, A. Nalitov, D.D. Solnyshkov, G. Malpuech, K. S. Novoselov, J. M. Smith, M. S. Skolnick, D. N. Krizhanovskii, A. I. Tartakovskii, “Exciton-polaritons in van der Waals heterostructures embedded in tunable microcavities”, NATURE COMMUNICATIONS, 6, 8579 (2015).

O. Del Pozo-Zamudio, S. Schwarz, M. Sich, I. A. Akimov, M. Bayer, R. C. Schofield, E. A. Chekhovich, B. J. Robinson, N. D. Kay,
O. V. Kolosov, A. I. Dmitriev, G. V. Lashkarev, D. N. Borisenko, N. N. Kolesnikov, A. I. Tartakovskii, “Photoluminescence of two-dimensional GaTe and GaSe films”, 2D Materials, 2, 035010 (2015).

F. Withers, O. Del Pozo-Zamudio, A. Mishchenko, A. P. Rooney, A. Gholinia, K. Watanabe, T. Taniguchi, S. J. Haigh, A. K. Geim, A. I. Tartakovskii, K. S. Novoselov, “Light-emitting diodes by band-structure engineering in van der Waals heterostructures”, NATURE MATERIALS, 14, 301 (2015).

E. A. Chekhovich, M. Hopkinson, M. S. Skolnick, A. I. Tartakovskii, “Suppression of nuclear spin bath fluctuations in self-assembled quantum dots induced by inhomogeneous strain”, NATURE COMMUNICATIONS, 6, 6348 (2015).

S. J. Haigh, A. P. Rooney, E. Prestat, F. Withers, O. Del Pozo Zamudio, A. Mishchenko, A. Gholinia, K. Watanabe, T. Taniguchi, A. I. Tartakovskii, A. K. Geim, K. S. Novoselov, “Cross sectional STEM imaging and analysis of multilayered two dimensional crystal heterostructure devices”, MICROSCOPY AND MICROANALYSIS 21, 107 (2015).

2014

B. Pingault, J. N. Becker, C. H. H. Schulte, C. Arend, C. Hepp, T. Godde, A. I. Tartakovskii, M. Markham, C. Becher, M. Atature, “All-Optical Formation of Coherent Dark States of Silicon-Vacancy Spins in Diamond”, PHYSICAL REVIEW LETTERS, 113, 263601 (2014).

S. Schwarz, S. Dufferwiel, P. M. Walker, F. Withers, A. A. P. Trichet, M. Sich, F. Li, E. A. Chekhovich, D. N. Borisenko, N. N. Kolesnikov, K. S. Novoselov, M. S. Skolnick, J. M. Smith, D. N. Krizhanovskii, A. I. Tartakovskii, “Two-Dimensional Metal-Chalcogenide Films in Tunable Optical Microcavities”, NANO LETTERS, 14, 7003 (2014).

C. Bulutay, E. A. Chekhovich, A. I. Tartakovskii, “Nuclear magnetic resonance inverse spectra of InGaAs quantum dots: Atomistic level structural information”, PHYSICS REVIEW B, 90, 205425 (2014).

2013

D. Sercombe, S. Schwarz, O. Del Pozo-Zamudio, F. Liu, B. J. Robinson, E. A. Chekhovich, I. I. Tartakovskii, O. Kolosov, A. I. Tartakovskii, “Optical investigation of the natural electron doping in thin MoS2 films deposited on dielectric substrates”, SCIENTIFIC REPORTS, 3, 3489 (2013).

E. A. Chekhovich, M. N. Makhonin, A. I. Tartakovskii, A. Yacoby, H. Bluhm, K. C. Nowack, L. M. K. Vandersypen “Nuclear spin effects in semiconductor quantum dots”, NATURE MATERIALS, 12, 494 (2013).

J. Puebla, E. A. Chekhovich, M. Hopkinson, P. Senellart, A. Lemaitre, M. S. Skolnick, and A. I. Tartakovskii, “Dynamic nuclear polarization in InGaAs/GaAs and GaAs/AlGaAs quantum dots under nonresonant ultralow-power optical excitation”, PHYSICAL REVIEW B 88, 045306 (2013).

I. J. Luxmoore, R. Toro, O. Del Pozo-Zamudio, N. A. Wasley, E. A. Chekhovich, A. M. Sanchez, R. Beanland, A. M. Fox, M. S. Skolnick, H. Y. Liu, A. I. Tartakovskii, “III–V quantum light source and cavity-QED on Silicon”, SCIENTIFIC REPORTS, 3, 1239 (2013).

E. A. Chekhovich, M. M. Glazov, A. B. Krysa, M. Hopkinson, P. Senellart, A. Lemaître, M. S. Skolnick, A. I. Tartakovskii, “Element-sensitive measurement of the hole–nuclear spin interaction in quantum dots”, NATURE PHYSICS, 9, 74 (2013).

2012

O. D. D. Couto, Jr., D. Sercombe, J. Puebla, L. Otubo, I. J. Luxmoore, M. Sich, T. J. Elliott, E. A. Chekhovich, L. R. Wilson, M. S. Skolnick, H.Y. Liu, A. I. Tartakovskii, “Effect of a GaAsP Shell on the Optical Properties of Self-Catalyzed GaAs Nanowires Grown on Silicon”, NANO LETTERS, 12, 5269 (2012).

E. A. Chekhovich, K. V. Kavokin, J. Puebla, A. B. Krysa, M. Hopkinson, A. D. Andreev, A. M. Sanchez, R. Beanland, M. S. Skolnick, A. I. Tartakovskii, “Structural analysis of strained quantum dots using nuclear magnetic resonance”, NATURE NANOTECHNOLOGY, 7, 646 (2012).

I. J. Luxmoore, E. D. Ahmadi, B. J. Luxmoore, N. A. Wasley, A. I. Tartakovskii, M. Hugues, M. S. Skolnick, A. M. Fox, “Restoring mode degeneracy in H1 photonic crystal cavities by uniaxial strain tuning”, APPLIED PHYSICS LETTERS, 100, 121116 (2012).

O. Makarovsky, E. E. Vdovin, A. Patane, L. Eaves, M. N. Makhonin, A. I. Tartakovskii, M. Hopkinson, “Laser Location and Manipulation of a Single Quantum Tunneling Channel in an InAs Quantum Dot”, PHYSICAL REVIEW LETTERS, 108, 117402 (2012).

2011

M. N. Makhonin, K. V. Kavokin, P. Senellart, A. Lemaître, A. J. Ramsay, M. S. Skolnick, A. I. Tartakovskii, “Fast control of nuclear spin polarization in an optically pumped single quantum dot”, NATURE MATERIALS 10, 844 (2011).

O. D. D. Couto, Jr., J. Puebla, E. A. Chekhovich, I. J. Luxmoore, C. J. Elliott, N. Babazadeh, M. S. Skolnick, A. I. Tartakovskii, and A. B. Krysa, “Charge control in InP/(Ga,In)P single quantum dots embedded in Schottky diodes”, PHYSICAL REVIEW B 84, 125301 (2011).

E. A. Chekhovich, A. B. Krysa, M. S. Skolnick, A. I. Tartakovskii, “Light-polarization-independent nuclear spin alignment in a quantum dot”, PHYSICAL REVIEW B 83, 125318 (2011).

E. A. Chekhovich, A. B. Krysa, M. S. Skolnick, and A. I. Tartakovskii, “Direct Measurement of the Hole-Nuclear Spin Interaction in Single InP/GaInP Quantum Dots Using Photoluminescence Spectroscopy”, PHYSICAL REVIEW LETTERS 106, 027402 (2011).

Ł. Kłopotowski, V. Voliotis, A. Kudelski, A. I. Tartakovskii, P. Wojnar, K. Fronc, R. Grousson, O. Krebs, M. S. Skolnick, G. Karczewski, and T. Wojtowicz, “Stark spectroscopy and radiative lifetimes in single self-assembled CdTe quantum dots”, PHYSICAL REVIEW B 83, 155319 (2011).

2010

I. J. Luxmoore, E. D. Ahmadi, N. A. Wasley, A. M. Fox, A. I. Tartakovskii, A. B. Krysa, M. S. Skolnick, “Control of spontaneous emission from InP single quantum dots in GaInP photonic crystal nanocavities”, APPLIED PHYSICS LETTERS 97, 181104 (2010).

M. N. Makhonin, E. A. Chekhovich, P. Senellart, A. Lemaître, M. S. Skolnick, A. I. Tartakovskii, “Optically tunable nuclear magnetic resonance in a single quantum dot”, PHYSICAL REVIEW B 82, 161309(R) (2010).

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