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Title: Multistable excitonic Stark effect
Authors: Xiong, Ying
Rudner, Mark S.
Song, Justin Chien Wen
Keywords: Science::Physics
Issue Date: 2022
Source: Xiong, Y., Rudner, M. S. & Song, J. C. W. (2022). Multistable excitonic Stark effect. Physical Review Research, 4(2), 023168-.
Project: MOE2018-T3-1-002
Journal: Physical Review Research
Abstract: The optical Stark effect is a tell-tale signature of coherent light-matter interaction in excitonic systems, wherein an irradiating light beam tunes exciton transition frequencies. Here we show that, when excitons are placed in a nanophotonic cavity, the excitonic Stark effect can become highly nonlinear, exhibiting multi-valued and hysteretic Stark shifts that depend on the history of the irradiating light. This multistable Stark effect (MSE) arises from feedback between the cavity mode occupation and excitonic population, mediated by the Stark-induced mutual tuning of the cavity and excitonic resonances. Strikingly, the MSE manifests even for very dilute exciton concentrations and can yield discontinuous Stark shift jumps of order meV. We expect that the MSE can be realized in readily available transition metal dichalcogenide excitonic systems placed in planar photonic cavities, at modest pump intensities. This phenomenon can provide new means to engineer coupled states of light and matter that can persist even in the single exciton limit.
ISSN: 2643-1564
DOI: 10.1103/PhysRevResearch.4.023168
DOI (Related Dataset): 10.21979/N9/QLOFAD
Schools: School of Physical and Mathematical Sciences 
Rights: © 2022 The Author(s). Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article’s title, journal citation, and DOI
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:SPMS Journal Articles

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