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 and Jason M. Smith ()
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Lucas C. Flatten: University of Oxford
David M. Coles: University of Oxford
Zhengyu He: University of Oxford
David G. Lidzey: University of Sheffield
Robert A. Taylor: Clarendon Laboratory, University of Oxford
Jamie H. Warner: University of Oxford
Jason M. Smith: University of Oxford

Nature Communications, 2017, vol. 8, issue 1, 1-5

Abstract: 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 WS2. Our findings offer a perspective for electrically controlled nonlinear polariton devices at room temperature.

Date: 2017
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DOI: 10.1038/ncomms14097

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