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arXiv · 1608.05274

Electrically tunable organic-inorganic hybrid polaritons with monolayer WS2

Lucas C. Flatten·David M. Coles·Zhengyu He·David. G. Lidzey·Robert A. Taylor·Jamie H. Warner·Jason M. Smith
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Abstract

Exciton-polaritons are quasiparticles consisting of a linear superposition of photonic and excitonic states, offering potential for nonlinear optical devices. The excitonic component of the polariton provides a finite Coulomb scattering cross section, such that the different types of exciton found in organic materials (Frenkel) and inorganic materials (Wannier-Mott) produce polaritons with different interparticle interaction strength. A hybrid polariton state with distinct excitons provides a potential technological route towards in-situ control of nonlinear behaviour. Here we demonstrate a device in which hybrid polaritons are displayed at ambient temperatures, the excitonic component of which is part Frenkel and part Wannier-Mott, and in which the dominant exciton type can be switched with an applied voltage. The device consists of an open microcavity containing both organic dye and a monolayer of the transition metal dichalcogenide WS$_2$. Our findings offer a perspective for electrically controlled nonlinear polariton devices at room temperature.

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Lucas C. Flatten, David M. Coles, Zhengyu He, David. G. Lidzey, Robert A. Taylor, Jamie H. Warner, Jason M. Smith. 2016-08-18. Electrically tunable organic-inorganic hybrid polaritons with monolayer WS2. https://doi.org/10.1038/ncomms14097

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