Valley polarization of exciton-polaritons in monolayer WSe2 in a tunable microcavity

Mateusz Król; Katarzyna Lekenta; Rafał Mirek; Karolina Łempicka; Daniel Stephan; Karol Nogajewski; MacIej R. Molas; Adam Babiński; Marek Potemski; Jacek Szczytko; Barbara Piȩtka

doi:10.1039/c9nr02038a

Valley polarization of exciton-polaritons in monolayer WSe₂ in a tunable microcavity

Mateusz Król^*, Katarzyna Lekenta, Rafał Mirek, Karolina Łempicka, Daniel Stephan, Karol Nogajewski, MacIej R. Molas, Adam Babiński, Marek Potemski, Jacek Szczytko, Barbara Piȩtka

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

22 Citations (Scopus)

Abstract

Monolayer transition metal dichalcogenides, known for exhibiting strong excitonic resonances, constitute a very interesting and versatile platform for the investigation of light-matter interactions. In this work, we report on a strong coupling regime between excitons in monolayer WSe₂ and photons confined in an open, voltage-tunable dielectric microcavity. The tunability of our system allows us to extend the exciton-polariton state over a wide energy range and, in particular, to bring the excitonic component of the lower polariton mode into resonance with other excitonic transitions in monolayer WSe₂. We can retain up to 40% of initial circular polarization of the laser or loose it completely if polariton modes are brought into resonances with low energy excitonic modes.

Original language	English
Pages (from-to)	9574-9579
Number of pages	6
Journal	Nanoscale
Volume	11
Issue number	19
DOIs	https://doi.org/10.1039/c9nr02038a
Publication status	Published - 21 May 2019
Externally published	Yes

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title = "Valley polarization of exciton-polaritons in monolayer WSe2 in a tunable microcavity",

abstract = "Monolayer transition metal dichalcogenides, known for exhibiting strong excitonic resonances, constitute a very interesting and versatile platform for the investigation of light-matter interactions. In this work, we report on a strong coupling regime between excitons in monolayer WSe2 and photons confined in an open, voltage-tunable dielectric microcavity. The tunability of our system allows us to extend the exciton-polariton state over a wide energy range and, in particular, to bring the excitonic component of the lower polariton mode into resonance with other excitonic transitions in monolayer WSe2. We can retain up to 40% of initial circular polarization of the laser or loose it completely if polariton modes are brought into resonances with low energy excitonic modes.",

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T1 - Valley polarization of exciton-polaritons in monolayer WSe2 in a tunable microcavity

AU - Król, Mateusz

AU - Lekenta, Katarzyna

AU - Mirek, Rafał

AU - Łempicka, Karolina

AU - Stephan, Daniel

AU - Nogajewski, Karol

AU - Molas, MacIej R.

AU - Babiński, Adam

AU - Potemski, Marek

AU - Szczytko, Jacek

AU - Piȩtka, Barbara

PY - 2019/5/21

Y1 - 2019/5/21

N2 - Monolayer transition metal dichalcogenides, known for exhibiting strong excitonic resonances, constitute a very interesting and versatile platform for the investigation of light-matter interactions. In this work, we report on a strong coupling regime between excitons in monolayer WSe2 and photons confined in an open, voltage-tunable dielectric microcavity. The tunability of our system allows us to extend the exciton-polariton state over a wide energy range and, in particular, to bring the excitonic component of the lower polariton mode into resonance with other excitonic transitions in monolayer WSe2. We can retain up to 40% of initial circular polarization of the laser or loose it completely if polariton modes are brought into resonances with low energy excitonic modes.

AB - Monolayer transition metal dichalcogenides, known for exhibiting strong excitonic resonances, constitute a very interesting and versatile platform for the investigation of light-matter interactions. In this work, we report on a strong coupling regime between excitons in monolayer WSe2 and photons confined in an open, voltage-tunable dielectric microcavity. The tunability of our system allows us to extend the exciton-polariton state over a wide energy range and, in particular, to bring the excitonic component of the lower polariton mode into resonance with other excitonic transitions in monolayer WSe2. We can retain up to 40% of initial circular polarization of the laser or loose it completely if polariton modes are brought into resonances with low energy excitonic modes.

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JF - Nanoscale

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ER -

Valley polarization of exciton-polaritons in monolayer WSe₂ in a tunable microcavity

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