2021/07/31 by Huaiyuan Yang, Xinqiang Wang, Xin-Zheng Li
Engineering · Physics and Astronomy · #Condensed matter physics #Exciton #Exciton-polaritons #Hamiltonian (control theory) #Materials science #Oscillator strength #Phonon #Physics #Polariton #Quantum mechanics #Quasiparticle #Strong Light-Matter Interactions #Superconductivity #Thermal Radiation and Cooling Technologies #cond-mat.mtrl-sci
paper · pdf · doi:10.1103/physrevb.104.205307
12 pages, 7 figures
arxiv created 2021/10/27 · openalex publication_date 2021/11/19 · arxiv updated 2021/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Microcavity exciton-polaritons are two-dimensional bosonic quasiparticles composed by excitons and photons. Using a model Hamiltonian with parameters generated from ab initio density-functional theory and Bethe-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 oscillator 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, an exciton-polariton mediated superconducting device can also be fabricated at a few tens of kelvin using the microcavity structure proposed by Laussy et al. Phys. Rev. Lett. 104, 106402 (2010).