Electrostatic control of nonlinear photonic-crystal polaritons in a monolayer semiconductor

Integration of 2D semiconductors with photonic crystal slabs provides an attractive approach to achieve strong light--matter coupling and exciton-polariton formation in a planar chip-compatible geometry. However, for the development of practical devices, it is crucial that the polariton excitations...

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Bibliographic Details
Published in:arXiv.org 2024-03
Main Authors: Khestanova, Ekaterina, Shahnazaryan, Vanik, Kozin, Valerii K, Kondratyev, Valeriy I, Krizhanovskii, Dmitry N, Skolnick, Maurice S, Shelykh, Ivan A, Iorsh, Ivan V, Kravtsov, Vasily
Format: Article
Language:English
Subjects:
Excitons
Monolayers
Nonlinear control
Nonlinear response
Nonlinearity
Optical switching
Photonic crystals
Polaritons
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Summary:Integration of 2D semiconductors with photonic crystal slabs provides an attractive approach to achieve strong light--matter coupling and exciton-polariton formation in a planar chip-compatible geometry. However, for the development of practical devices, it is crucial that the polariton excitations in the structure are easily tunable and exhibit strong nonlinear response. Here we study neutral and charged exciton-polaritons in an electrostatically gated planar photonic crystal slab with an embedded monolayer semiconductor MoSe\(_2\) and experimentally demonstrate strong polariton nonlinearity, which can be tuned via gate voltage. We find that modulation of dielectric environment within the photonic crystal results in the formation of two distinct resonances with significantly different nonlinear response, which enables optical switching with ultrashort laser pulses. Our results open new avenues towards development of active polaritonic devices in a compact chip-compatible implementation.
ISSN:2331-8422
DOI:10.48550/arxiv.2402.16193