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  • Letter
  • Open Access

Cavity exciton polaritons in two-dimensional semiconductors from first principles

Dino Novko and Vito Despoja*

  • Institute of Physics, Bijenička 46, 10000 Zagreb, Croatia and Donostia International Physics Center (DIPC), P. Manuel de Lardizabal, 4, 20018 San Sebastián, Spain

  • *vdespoja@ifs.hr
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Phys. Rev. Research 3, L032056 – Published 3 September, 2021

DOI: https://doi.org/10.1103/PhysRevResearch.3.L032056

Abstract

A two-dimensional (2D) semiconducting microcavity, where exciton polaritons can be formed, constitutes a promising setup for exploring and manipulating various regimes of light-matter interaction. Here, the coupling between 2D excitons and metallic cavity photons is studied by using a first-principles propagator technique. The strength of exciton-photon coupling is characterised by its Rabi splitting to two exciton polaritons, which can be tuned by cavity thickness. Maximum splitting of 128 meV is achieved in the phosporene cavity, while a remarkable value of about 440 meV is predicted in a monolayer hexagonal boron nitride device. The obtained Rabi splittings in a WS2 microcavity are in excellent agreement with recent experiments. The present methodology can aid in predicting and proposing potential setups for trapping robust 2D exciton-polariton condensates.

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Phys. Rev. Research 3, L032056– Published 3 September, 2021
  • Received 12 May 2021
  • Revised 12 August 2021
  • Accepted 16 August 2021
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