Shegai Group | Chalmers

The scientific interests, goals and area of expertise of the Shegai group can be briefly summarized as nanoscale light-matter interactions. Our aim is to investigate fundamental and quantum optical aspects of light matter-interactions, as well as to develop practical applications in e.g. surface-enhanced spectroscopies and sensing. The benchmark of the group is experimental facilities and experience that allows us to perform experiments on a single nanoparticle – single molecule level.

Our recent activities include plasmon-exciton interactions, strong coupling phenomena, non-linear and low temperature single particle imaging and spectroscopy, surface-enhanced Raman scattering and fluorescence microscopy.

We are always looking for passionate and talented Master students, PhDs and posdocs!

If you are interested in our research write directly to timurs@chalmers.se.

Recent publications

For a complete list see e.g. Google Scholar and Research Gate

Battulga Munkhbat, Piotr Wróbel, Tomasz J. Antosiewicz, and Timur O. Shegai

Optical Constants of Several Multilayer Transition Metal Dichalcogenides Measured by Spectroscopic Ellipsometry in the 300–1700 nm Range: High Index, Anisotropy, and Hyperbolicity

ACS Photonics (2022)

DOI: acsphotonics.2c00433

Mikael Kuisma, Benjamin Rousseaux, Krzysztof M. Czajkowski, Tuomas P. Rossi, Timur Shegai, Paul Erhart, and Tomasz J. Antosiewicz

Ultrastrong Coupling of a Single Molecule to a Plasmonic Nanocavity: A First-Principles Study

ACS Photonics (2022)

DOI: acsphotonics.2c00066

Falko Schmidt, Agnese Callegari, Abdallah Daddi-Moussa-Ider, Battulga Munkhbat, Ruggero Verre, Timur Shegai, Mikael Käll, Hartmut Löwen, Andrea Gambassi, Giovanni Volpe
Tunable critical Casimir forces counteract Casimir-Lifshitz attraction

ArXiV (2022)

DOI: arXiv:2202.10926

Battulga Munkhbat, Betül Küçüköz, Denis G. Baranov, Tomasz J. Antosiewicz, Timur O. Shegai

Nanostructured transition metal dichalcogenide multilayers for advanced nanophotonics

ArXiV (2022)

DOI: arXiv:2202.04898

Joel Yuen-Zhou, Wei Xiong, and Timur Shegai

Polariton chemistry: Molecules in cavities and plasmonic media

Journal of Chemical Physics (2022)

DOI: 10.1063/5.0080134

Betül Kücükoz, Battulga Munkhbat and Timur Shegai

Boosting Second-Harmonic Generation in Monolayer Rhenium Disulfide by Reversible Laser Patterning

ACS Photonics (2022)

DOI: acsphotonics.1c01358

Battulga Munkhbat, Adriana Canales, Betül Kücükoz, Denis G. Baranov and Timur Shegai

Casimir microcavities for tunable self-assembled polaritons

Nature (2021)

DOI:10.1038/s41586-021-03826-3

Manuel Hertzog, Battulga Munkhbat, Denis G. Baranov, Timur Shegai and Karl Börjesson

Enhancing vibrational light-matter coupling strength beyond the molecular concentration limit using plasmonic arrays

Nano Letters (2021) - Congratulations to Denis Baranov for making the cover!

DOI: 10.1021/acs.nanolett.0c04014

G. A. Ermolaev, D. V. Grudinin, Y. V. Stebunov, K. V. Voronin, V. G. Kravets, J. Duan, A. B. Mazitov, G. I. Tselikov, A. Bylinkin, D. I. Yakubovsky, S. M. Novikov, D. G. Baranov, A. Y. Nikitin, I. A. Kruglov, T. Shegai, P. Alonso-González, A. N. Grigorenko, A. V. Arsenin, K. S. Novoselov & V. S. Volkov

Giant optical anisotropy in transition metal dichalcogenides for next-generation photonics

Nature Communications (2021)

DOI:10.1038/s41467-021-21139-x

Adriana Canales, Denis G. Baranov, Tomasz J. Antosiewicz and Timur Shegai

Abundance of cavity-free polaritonic states in resonant materials and nanostructures

Journal of Chemical Physics (2021)

DOI: 10.1063/5.0033352

Benjamin Rousseaux, Denis G. Baranov, Tomasz J. Antosiewicz, Timur Shegai, and Göran Johansson

Strong coupling as an interplay of quantum emitter hybridization with plasmonic dark and bright modes

Physical Review Research (2020)

DOI:10.1103/PhysRevResearch.2.033056

Thomas D. Green, Denis G. Baranov, Battulga Munkhbat, Ruggero Verre, Timur Shegai and Mikael Käll

Optical material anisotropy in high-index transition metal dichalcogenide Mie nanoresonators

Optica (2020)

DOI:10.1364/OPTICA.389192

Georgy A. Ermolaev, Yury V. Stebunov, Andrey A. Vyshnevyy, Dmitry E. Tatarkin, Dmitry I. Yakubovsky, Sergey M. Novikov, Denis G. Baranov, Timur Shegai, Alexey Y. Nikitin, Aleksey V. Arsenin, and Valentyn S. Volkov

Broadband optical properties of monolayer and bulk MoS₂

NPJ 2D Materials and applications (2020)

DOI: 10.1038/s41699-020-0155-x

Ekaterina Tiguntseva, Kirill Koshelev, Aleksandra Furasova, Pavel Tonkaev, Vladimir Mikhailovskii, Elena V. Ushakova, Denis G. Baranov, Timur Shegai, Anvar Zakhidov, Yuri Kivshar and Sergey Makarov

Room temperature lasing from Mie resonant nonplasmonic nanoparticles

ACS Nano (2020)

DOI: 10.1021/acsnano.0c01468

Battulga Munkhbat, Andrew B. Yankovich, Ruggero Verre, Eva Olsson and Timur Shegai

Transition metal dichalcogenide materials with atomic precision

Nature Communications

DOI: 10.1038/s41467-020-18428-2

Denis G. Baranov, Battulga Munkhbat, Elena Zhukova, Benjamin Rousseaux, Ankit Bisht, Adriana Canales, Göran Johansson, Tomasz Antosiewicz and Timur Shegai

Ultrastrong coupling between nanoparticle plasmons and cavity photons at ambient conditions

Nature Communications (2020)

doi: 10.1038/s41467-020-16524-x

D.I. Markina, E. Yu Tiguntseva, A.P Pushkarev, M.A. Samsonov, M. Vengris, B. Munkhbat, T. Shegai, G.B. Hix, A.A. Zakhidov and S.V. Makarov

Photophysical properties of halide perovskite CsPb(Br(1-X)IX)3 thin films and nanowires

Journal of Luminescence (2020)

DOI: 10.1016/j.jlumin.2019.116985

Battulga Munkhbat, Denis G. Baranov, Ankit Bisht, Md Anamul Hoque, Bodgan Karpiak, Saroj P. Dash and Timur Shegai

Electrical Control of Hybrid Monolayer Tungsten Disulfide-Plasmonic Nanoantenna Light-Matter States at Cryogenic and Room Temperatures

ACS Nano (2020)

DOI:10.1021/acsnano.9b09684

Denis G. Baranov, Battulga Munkhbat, Nils Odebo Länk, Ruggero Verre, Mikael Käll and Timur Shegai

Circular Dichroism Mode Splitting and Bounds to its Enhancement With Cavity-Plasmon-Polaritons

Nanophotonics (2019)

DOI: 10.1515/nanoph-2019-0372

Martin Wersäll, Battulga Munkhbat, Denis G. Baranov, Felipe Herrera, Jianshu Cao, Tomasz J. Antosiewicz and Timur Shegai

Correlative Dark-Field and Photoluminescence Spectroscopy of Individual Plasmon-Molecule Hybrid Nanosctructures in a Strong Coupling Regime

ACS Photonics (2019)

DOI: 10.1021/acsphotonics.9b01079

Denis G. Baranov, Yuzhe Xiao, Igor A. Nechepurenko, Alex Krasnok, Andrea Alu and Mikhail A. Kats

Nanophotonic engineering of far-field thermal emitters

Nature Materials (2019)

DOI: 10.1038/s41563-019-0363-y

Andrew B. Yankovich, Battulga Munkhbat, Denis G. Baranov, Jorge Cuadra, Hugo Lourenco-Martins, Luis H. G. Tizei, Mathieu Kociak, Eva Olsson and Timur Shegai

Visualizing plasmon-exciton polaritons at the nanoscale using electron microscopy

Nanoletters

DOI:10.1021/acs.nanolett.9b03534

Tuomas P. Rossi, Timur Shegai, Paul Erhart and Tomasz J. Antosiewicz

Strong plasmon-molecule coupling at the nanoscale revealed by first-principles modeling

Nature Communications (2019)

DOI: 10.1038/s41467-019-11315-5

Ruggero Verre, Denis G. Baranov, Battulga Munkhbat, Jorge Cuadra, Mikael Käll and Timur Shegai

Transition metal dichalcogenide nanodisks as high-index dielectric Mie nanoresonators

Nature Nanotechnology (2019)

DOI: 10.1038/s41565-019-0442-x

Ankit Bisht , Jorge Cuadra, Martin Wersäll, Adriana Canales, Tomasz J. Antosiewicz and Timur Shegai

Collective Strong Light-Matter Coupling in Hierarchical Microcavity-Plasmon-Exciton Systems

Nano Letters (2018)

DOI: 10.1021/acs.nanolett.8b03639

Battulga Munkhbat, Denis G. Baranov, Michael Stührenberg, Martin Wersäll, Ankit Bisht and Timur Shegai

Self-hybridized exciton-polaritons in multilayers of transition metal dichalcogenides for efficient light absorption

ACS Photonics (2018)

DOI: 10.1021/acsphotonics.8b01194

Michael Stührenberg, Battulga Munkhbat, Denis G. Baranov, Jorge Cuadra, Andrew B. Yankovich, Tomasz J. Antosiewicz, Eva Olsson, and Timur Shegai

Strong Light-Matter Coupling between Plasmons in Individual Gold Bi-Pyramids and Excitons in Mono- and Multilayer WSe₂

Nano Letters (2018)

DOI: 10.1021/acs.nanolett.8b02652

Ekaterina Y. Tiguntseva, Denis G. Baranov, Anatoly P. Pushkarev, Battulga Munkhbat, Filipp Komissarenko, Marius Franckevicius, Anvar A. Zakhidov, Timur Shegai, Yuri S. Kivshar, and Sergey V. Makarov

Tunable Hybrid Fano Resonances in Halide Perovskite Nanoparticles

Nano Letters (2018)

DOI: 10.1021/acs.nanolett.8b01912

Benjamin Rosseaux, Denis G. Baranov, Mikael Käll, Timur Shegai, and Göran Johansson

Quantum Description and Emergence of Nonlinearities in Strongly Coupled Single-Emitter Nanoantenna Systems

Physical Review B (2018)

DOI: doi.org/10.1103/PhysRevB.98.045435

Battulga Munkhbat, Martin Wersäll, Denis G. Baranov, Tomasz J. Antosiewicz, and Timur Shegai

Suppression of Photo-Oxidation of Organic Chromophores by Strong Coupling to Plasmonic Nanoantennas

Science Advances (2018)

DOI: 10.1126/sciadv.aas9552

Jorge Cuadra, Denis G. Baranov, Martin Wersäll, Ruggero Verre, Tomasz J. Antosiewicz, and Timur Shegai
Observation of Tunable Charged Exciton Polaritons in Hybrid Monolayer WS₂ - Plasmonic Nanoantenna System
Nano Letters (2017)
DOI: 10.1021/acs.nanolett.7b04965

Denis G. Baranov, Martin Wersäll, Jorge Cuadra, Tomasz J. Antosiewicz, and Timur Shegai

Novel Nanostructures and Materials for Strong Light-Matter Interactions

ACS Photonics (2017) - Congratulations to Denis Baranov for making the cover!

DOI: 10.1021/acsphotonics.7b00674

Denis G. Baranov, Alex Krasnok, Timur Shegai, Andrea Alù, and Yidong Chong

Coherent Perfect Absorbers: Linear Control of Light with Light

Nature Review Materials (2017)

DOI: 10.1038/natrevmats.2017.64

Jorge Cuadra, Ruggero Verre, Martin Wersäll, Clemens Krückel, Victor Torres-Company, Tomasz J. Antosiewicz, and Timur Shegai

Hybrid Dielectric Waveguide Spectroscopy of Individual Plasmonic Nanoparticles

AIP Advances (2017)

DOI: http://dx.doi.org/10.1063/1.4986423

Martin Wersäll, Jorge Cuadra, Tomasz J. Antosiewicz, Sinan Balci, and Timur Shegai
Observation of Mode Splitting in Photoluminescence of Individual Plasmonic Nanoparticles
Strongly Coupled to Molecular Excitons
Nano Letters (2016)
DOI: 10.1021/acs.nanolett.6b04659

Zhong-Jian Yang, Tomasz J. Antosiewicz, and Timur Shegai
Role of Material Loss and Mode Volume of Plasmonic Cavities for Strong Plasmon-Exciton Interactions
Optics Express (2016)
DOI: 10.1364/OE.24.020373

Gülis Zengin, Tina Gschneidtner, Ruggero Verre, Lei Shao, Tomasz J. Antosiewicz, Kasper Moth-Poulsen, Mikael Käll, and Timur Shegai
Evaluating Conditions for Strong Coupling between Nanoparticle Plasmons and Organic Dyes Using Scattering and Absorption Spectroscopy
J. Phys. Chem. C. (2016)
http://pubs.acs.org/doi/abs/10.1021/acs.jpcc.6b00219

Gülis Zengin, Martin Wersäll, Sara Nilsson, Tomasz J. Antosiewicz, Mikael Käll, and
Timur Shegai
Realizing Strong Light-Matter Interactions between Single-Nanoparticle Plasmons and
Molecular Excitons at Ambient Conditions
Phys. Rev. Lett. 114, 157401, (2015)
DOI: http://dx.doi.org/10.1103/PhysRevLett.114.157401

Martin Wersäll, Ruggero Verre, Mikael Svedendahl, Peter Johansson, Mikael Käll, and

Timur Shegai

Directional Nanoplasmonic Antennas for Self-Referenced Refractometric Molecular Analysis

J. Phys. Chem. C, 118, 21075-21080, (2014)

DOI: 10.1021/jp5064929

Tomasz J. Antosiewicz, S. Peter Apell, and Timur Shegai

Plasmon-Exciton Interactions in a Core-Shell Geometry: From Enhanced Absorption to

Strong Coupling

ACS Photonics, 1, 454-463, (2014)

DOI: 10.1021/ph500032d

Gülis Zengin, Göran Johansson, Peter Johansson, Tomasz J. Antosiewicz, Mikael Käll, and

Timur Shegai

Approaching the Strong Coupling Limit in Single Plasmonic Nanorods Interacting with J-aggregates

Scientific Reports 3, 3074, (2013)

DOI: 10.1038/srep03074

Project Leader

Timur Shegai