Polariton hyperspectral imaging of two-dimensional semiconductor crystals
Abstract
Atomically thin crystals of transition metal dichalcogenides (TMDs) host excitons with strong binding energies and sizable light-matter interactions. Coupled to optical cavities, monolayer TMDs routinely reach the regime of strong light-matter coupling, where excitons and photons admix coherently to form polaritons up to room temperature. Here, we explore the two-dimensional nature of TMD polaritons with scanning-cavity hyperspectral imaging. We record a spatial map of polariton properties of extended WS2 monolayers coupled to a tunable micro cavity in the strong coupling regime, and correlate it with maps of exciton extinction and fluorescence taken from the same fake with the cavity. We find a high level of homogeneity, and show that polariton splitting variations are correlated with intrinsic exciton properties such as oscillator strength and linewidth. Moreover, we observe a deviation from thermal equilibrium in the resonant polariton population, which we ascribe to non-Markovian polariton-phonon coupling. Our measurements reveal a promisingly consistent polariton landscape, and highlight the importance of phonons for future polaritonic devices.
- Authors:
-
- Ludwig Maximilian Univ. of Munich, Munich (Germany). Faculty of Physics; Max Planck Inst. fuer Quantenoptik, Garching (Germany)
- Ludwig Maximilian Univ. of Munich, Munich (Germany). Faculty for Physics. Center for NanoScience (CeNS). Munich Quantum Center
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Materials Physics and Applications Division. Materials Synthesis and Integrated Devices
- Univ. of Bremen (Germany). Inst. for Theoretical Physics
- Ludwig Maximilian Univ. of Munich, Munich (Germany). Faculty of Physics; Max Planck Inst. fuer Quantenoptik, Garching (Germany)
- Karlsruhe Inst. of Technology (KIT) (Germany). Physikalisches Inst.
- Publication Date:
- Research Org.:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC)
- OSTI Identifier:
- 1624493
- Grant/Contract Number:
- AC52-06NA25396
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Scientific Reports
- Additional Journal Information:
- Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2045-2322
- Publisher:
- Nature Publishing Group
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; Science & Technology - Other Topics
Citation Formats
Gebhardt, Christian, Förg, Michael, Yamaguchi, Hisato, Bilgin, Ismail, Mohite, Aditya D., Gies, Christopher, Florian, Matthias, Hartmann, Malte, Hänsch, Theodor W., Högele, Alexander, and Hunger, David. Polariton hyperspectral imaging of two-dimensional semiconductor crystals. United States: N. p., 2019.
Web. doi:10.1038/s41598-019-50316-8.
Gebhardt, Christian, Förg, Michael, Yamaguchi, Hisato, Bilgin, Ismail, Mohite, Aditya D., Gies, Christopher, Florian, Matthias, Hartmann, Malte, Hänsch, Theodor W., Högele, Alexander, & Hunger, David. Polariton hyperspectral imaging of two-dimensional semiconductor crystals. United States. https://doi.org/10.1038/s41598-019-50316-8
Gebhardt, Christian, Förg, Michael, Yamaguchi, Hisato, Bilgin, Ismail, Mohite, Aditya D., Gies, Christopher, Florian, Matthias, Hartmann, Malte, Hänsch, Theodor W., Högele, Alexander, and Hunger, David. Tue .
"Polariton hyperspectral imaging of two-dimensional semiconductor crystals". United States. https://doi.org/10.1038/s41598-019-50316-8. https://www.osti.gov/servlets/purl/1624493.
@article{osti_1624493,
title = {Polariton hyperspectral imaging of two-dimensional semiconductor crystals},
author = {Gebhardt, Christian and Förg, Michael and Yamaguchi, Hisato and Bilgin, Ismail and Mohite, Aditya D. and Gies, Christopher and Florian, Matthias and Hartmann, Malte and Hänsch, Theodor W. and Högele, Alexander and Hunger, David},
abstractNote = {Atomically thin crystals of transition metal dichalcogenides (TMDs) host excitons with strong binding energies and sizable light-matter interactions. Coupled to optical cavities, monolayer TMDs routinely reach the regime of strong light-matter coupling, where excitons and photons admix coherently to form polaritons up to room temperature. Here, we explore the two-dimensional nature of TMD polaritons with scanning-cavity hyperspectral imaging. We record a spatial map of polariton properties of extended WS2 monolayers coupled to a tunable micro cavity in the strong coupling regime, and correlate it with maps of exciton extinction and fluorescence taken from the same fake with the cavity. We find a high level of homogeneity, and show that polariton splitting variations are correlated with intrinsic exciton properties such as oscillator strength and linewidth. Moreover, we observe a deviation from thermal equilibrium in the resonant polariton population, which we ascribe to non-Markovian polariton-phonon coupling. Our measurements reveal a promisingly consistent polariton landscape, and highlight the importance of phonons for future polaritonic devices.},
doi = {10.1038/s41598-019-50316-8},
journal = {Scientific Reports},
number = 1,
volume = 9,
place = {United States},
year = {Tue Sep 24 00:00:00 EDT 2019},
month = {Tue Sep 24 00:00:00 EDT 2019}
}
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