Shegai Group

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

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)

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)

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)

Battulga Munkhbat, Betül Küçüköz, Denis G. Baranov, Tomasz J. Antosiewicz, Timur O. Shegai
Nanostructured transition metal dichalcogenide multilayers for advanced nanophotonics
ArXiV (2022)

Joel Yuen-Zhou, Wei Xiong, and Timur Shegai
Polariton chemistry: Molecules in cavities and plasmonic media
Journal of Chemical Physics (2022)

Betül Kücükoz, Battulga Munkhbat and Timur Shegai
Boosting Second-Harmonic Generation in Monolayer Rhenium Disulfide by Reversible Laser Patterning
ACS Photonics (2022)

 Battulga Munkhbat, Adriana Canales, Betül Kücükoz, Denis G. Baranov and Timur Shegai
Casimir microcavities for tunable self-assembled polaritons
Nature (2021)

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!


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)

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)

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)​


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)

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)​


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)​

Battulga Munkhbat, Andrew B. Yankovich, Ruggero Verre, Eva Olsson and Timur Shegai
Transition metal dichalcogenide materials with atomic precision
Nature Communications

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)​

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)​

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)

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)


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)

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)

Andrew B. Yankovich, Battulga Mu​nkhbat, 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 

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)

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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)


A​nkit 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)

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)

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)

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)

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)

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)

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!

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)
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)


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)

 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)

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)

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)

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)
Project Leader
Timur Shegai

Page manager Published: Fri 15 Jul 2022.