Multistable excitonic Stark effect in a nanophonotonic cavity
ORAL
Abstract
The excitonic Stark effect, wherein off-resonant irradiation continuously tunes the exciton transition to higher frequencies as light intensity increases, arises from coherent light-matter interaction in excitonic systems. Here we argue that coupling to nanophotonic cavities can enable the excitonic Stark effect to become highly nonlinear, displaying multi-valued and hysteretic Stark shifts that depend on the history of the irradiating light. This multistable Stark effect (MSE) emerges from a (Stark-effect induced) feedback between cavity mode occupation and exciton population. In readily available transition metal dichalcogenides coupled to photonic cavities, we find that the MSE can exhibit discontinuous Stark shift jumps of order meV even for very dilute exciton concentrations at modest pump intensities. Strikingly, the MSE can persist even in the single exciton limit and provides new means to engineer coupled states of light and matter.
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Presenters
Justin Song
Nanyang Technological University, Division of Physics and Applied Physics, Nanyang Technological University, Division of Physics & Applied Physics, Nanyang Technological University, Singapore, nanyang technological university
Authors
Ying Xiong
Nanyang Technological University
Mark Rudner
Niels Bohr International Academy and the Center for Quantum Devices, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, University of Copenhagen, Niels Bohr Institute, Niels Bohr Institute / University of Copenhagen
Justin Song
Nanyang Technological University, Division of Physics and Applied Physics, Nanyang Technological University, Division of Physics & Applied Physics, Nanyang Technological University, Singapore, nanyang technological university
