Control of Strong Light-Matter Interaction in Monolayer WS2 through Electric Field Gating

Nano Letters
Biswanath ChakrabortyVinod M Menon

Abstract

Strong light-matter coupling results in the formation of half-light half-matter quasiparticles that take on the desirable properties of both systems such as small mass and large interactions. Controlling this coupling strength in real-time is highly desirable due to the large change in optical properties such as reflectivity that can be induced in strongly coupled systems. Here we demonstrate modulation of strong exciton-photon coupling in a monolayer WS2 through electric field induced gating at room temperature. The device consists of a WS2 field effect transistor embedded inside a microcavity structure which transitions from strong to weak coupling when the monolayer WS2 becomes more n-type under gating. This transition occurs due to the reduction in oscillator strength of the excitons arising from decreased Coulomb interaction in the presence of electrostatically induced free carriers. The possibility to electrically modulate a solid state system at room temperature from strong to weak coupling is highly desirable for realizing low energy optoelectronic switches and modulators operating both in quantum and classical regimes.

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Citations

Jan 22, 2019·Chemical Society Reviews·Manuel HertzogKarl Börjesson
Nov 14, 2019·Physical Chemistry Chemical Physics : PCCP·Zuzana Melnikova-KominkovaMartin Kalbac
Sep 25, 2019·Nature Nanotechnology·Jie GuVinod M Menon
May 20, 2020·Scientific Reports·Franziska WallArash Rahimi-Iman
Jul 18, 2020·Nature Communications·Aaron J SternbachD N Basov
Aug 28, 2020·Physical Review Letters·Artem StrashkoJonathan Keeling
Oct 9, 2020·Research : a Science Partner Journal·Ziwei LiAnlian Pan
Dec 11, 2020·Light, Science & Applications·Yuhan WangFengqiu Wang
Jul 24, 2021·Nanotechnology·Rahul DebnathArindam Ghosh
Sep 2, 2021·ACS Applied Materials & Interfaces·Xiaobo HanPeixiang Lu
Nov 6, 2021·Nature Communications·Hangyong ShanCarlos Antón-Solanas
May 8, 2019··Mandeep KhatoniarJie Gu

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