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Condensation of 2D exciton-polaritons in an open-access microcavity

Abstract : We establish a tunable open-access microcavity consisting of two planar distributed Bragg reflectors (DBRs) individually controlled by nanopositioners. By varying the cavity length, such configuration enables variation of the light–matter coupling strength by a factor of 2, while keeping in microresonators the same active region and cavity mirrors. Polariton condensation was demonstrated over a large range of Rabi splittings and the corresponding threshold diagram was derived as a function of cavity-exciton detuning, which fits well with theoretical simulations. The results show that for various light-matter coupling strengths, optimal detunings featured by the lowest condensation threshold always occur at a fixed depth of energy trap between the exciton reservoir and the polariton ground state, which enables the most efficient exciton–exciton scattering into the condensate state in the driven-dissipative polaritonic system.
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https://hal.uca.fr/hal-03705427
Contributor : Christophe Tournayre Connect in order to contact the contributor
Submitted on : Monday, June 27, 2022 - 9:31:37 AM
Last modification on : Friday, July 1, 2022 - 3:07:53 AM

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F Li, Y Li, L Giriunas, M Sich, Dmitry Solnyshkov, et al.. Condensation of 2D exciton-polaritons in an open-access microcavity. Journal of Applied Physics, American Institute of Physics, 2022, 131 (9), pp.093101. ⟨10.1063/5.0076459⟩. ⟨hal-03705427⟩

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