Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes

Strong coupling of electric transition dipoles with optical or plasmonic resonators modifies their light-matter interaction and, therefore, their optical spectra. Semiconducting WS_{2} nanotubes intrinsically provide the dipoles through their excitonic resonances, and the optical cavity via their cy...

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Main Authors: Bojana Višić, Lena Yadgarov, Eva A. A. Pogna, Stefano Dal Conte, Victor Vega-Mayoral, Daniele Vella, Reshef Tenne, Giulio Cerullo, Christoph Gadermaier
Format: Article
Language:English
Published: American Physical Society 2019-10-01
Series:Physical Review Research
Online Access:http://doi.org/10.1103/PhysRevResearch.1.033046
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author Bojana Višić
Lena Yadgarov
Eva A. A. Pogna
Stefano Dal Conte
Victor Vega-Mayoral
Daniele Vella
Reshef Tenne
Giulio Cerullo
Christoph Gadermaier
author_facet Bojana Višić
Lena Yadgarov
Eva A. A. Pogna
Stefano Dal Conte
Victor Vega-Mayoral
Daniele Vella
Reshef Tenne
Giulio Cerullo
Christoph Gadermaier
author_sort Bojana Višić
collection DOAJ
description Strong coupling of electric transition dipoles with optical or plasmonic resonators modifies their light-matter interaction and, therefore, their optical spectra. Semiconducting WS_{2} nanotubes intrinsically provide the dipoles through their excitonic resonances, and the optical cavity via their cylindrical shape. We investigate the nonequilibrium light-matter interaction in WS_{2} nanotubes in the time domain using femtosecond transient extinction spectroscopy. We develop a phenomenological coupled oscillator model with time-dependent parameters to describe the transient extinction spectra, allowing us to extract the underlying nonequilibrium electron dynamics. We find that the exciton and trion resonances shift due to many-body effects of the photogenerated charge carriers and their population dynamics on the femto- and picosecond timescale. Our results show that the time-dependent phenomenological model quantitatively reproduces the nonequilibrium optical response of strongly coupled systems.
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spelling doaj.art-cce746d159cf4893800b475d4cf32cc32024-04-12T16:46:20ZengAmerican Physical SocietyPhysical Review Research2643-15642019-10-011303304610.1103/PhysRevResearch.1.033046Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubesBojana VišićLena YadgarovEva A. A. PognaStefano Dal ConteVictor Vega-MayoralDaniele VellaReshef TenneGiulio CerulloChristoph GadermaierStrong coupling of electric transition dipoles with optical or plasmonic resonators modifies their light-matter interaction and, therefore, their optical spectra. Semiconducting WS_{2} nanotubes intrinsically provide the dipoles through their excitonic resonances, and the optical cavity via their cylindrical shape. We investigate the nonequilibrium light-matter interaction in WS_{2} nanotubes in the time domain using femtosecond transient extinction spectroscopy. We develop a phenomenological coupled oscillator model with time-dependent parameters to describe the transient extinction spectra, allowing us to extract the underlying nonequilibrium electron dynamics. We find that the exciton and trion resonances shift due to many-body effects of the photogenerated charge carriers and their population dynamics on the femto- and picosecond timescale. Our results show that the time-dependent phenomenological model quantitatively reproduces the nonequilibrium optical response of strongly coupled systems.http://doi.org/10.1103/PhysRevResearch.1.033046
spellingShingle Bojana Višić
Lena Yadgarov
Eva A. A. Pogna
Stefano Dal Conte
Victor Vega-Mayoral
Daniele Vella
Reshef Tenne
Giulio Cerullo
Christoph Gadermaier
Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
Physical Review Research
title Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
title_full Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
title_fullStr Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
title_full_unstemmed Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
title_short Ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of WS_{2} nanotubes
title_sort ultrafast nonequilibrium dynamics of strongly coupled resonances in the intrinsic cavity of ws 2 nanotubes
url http://doi.org/10.1103/PhysRevResearch.1.033046
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