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Enhancing ground state population and macroscopic coherence of room-temperature WS$_2$ polaritons through engineered confinement by Wurdack, M.; Estrecho, E.; Todd, S.; Schneider, C.; Truscott, A. G.; Ostrovskaya, E. A. is a scholarly article available to read on EtoBox.

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Exciton-polaritons (polaritons herein) in transition-metal dichalcogenide monolayers have attracted significant attention due to their potential for polariton-based optoelectronics. Many of the proposed applications rely on the ability to trap polaritons and to reach macroscopic occupation of their ground energy state. Here, we engineer a trap for room-temperature polaritons in an all-dielectric optical microcavity by locally increasing the interactions between the WS$_2$ excitons and cavity photons. The resulting confinement enhances the population and the first-order coherence of the polaritons in the ground state, with the latter effect related to dramatic suppression of disorder-induced inhomogeneous dephasing. We also demonstrate efficient population transfer into the trap when optically injecting free polaritons outside of its periphery.

Author

Wurdack, M.; Estrecho, E.; Todd, S.; Schneider, C.; Truscott, A. G.; Ostrovskaya, E. A.

Published

2021

Language

EN