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Electrically tunable organic–inorganic hybrid polaritons with monolayer WS(2)

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 i...

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Detalles Bibliográficos
Autores principales: Flatten, Lucas C., Coles, David M., He, Zhengyu, Lidzey, David G., Taylor, Robert A., Warner, Jamie H., Smith, Jason M.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5247603/
https://www.ncbi.nlm.nih.gov/pubmed/28094281
http://dx.doi.org/10.1038/ncomms14097
Descripción
Sumario: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.