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arXiv · 2107.14376

The exciton-polariton properties of hexagonal BN based microcavity and their potential applications in BEC and superconductivity

Huaiyuan Yang·Xinqiang Wang·Xin-Zheng Li
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Abstract

Microcavity exciton-polaritons are two-dimensional bosonic quasiparticles composed by excitons and photons. Using model Hamiltonian with parameters generated from ab initio density-functional theory and Bathe-Salpeter Equation calculations, we investigate the exciton and the exciton-polariton properties of hexagnonal boron nitride (hBN) based microcavity. We show that hBN based microcavities, including monolayer and all-dielectric ones, are promising in optoelectronic applications. Room temperature exciton-polariton Bose-Einstein Condensation can be achieved because of the large oscillating strength and binding energy of the exciton, and the strong interaction between the exciton-polaritons and the longitudinal optical phonons. Based on this BEC state, exciton-polariton mediated superconducting device can also be fabricated at such moderate temperatures using the microcavity structure proposed by Laussy et al.

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Huaiyuan Yang, Xinqiang Wang, Xin-Zheng Li. 2021-10-27. The exciton-polariton properties of hexagonal BN based microcavity and their potential applications in BEC and superconductivity. https://doi.org/10.1103/physrevb.104.205307

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