Abstract

Beyond the extensively studied microcavity polaritons, which are coupled modes of semiconductor excitons and microcavity photons, nearly 2D semiconductors placed in a suitable environment can support spatially localized exciton–polariton modes. We demonstrate theoretically that two distinct types of such modes can exist in a photonic crystal with an embedded transition metal dichalcogenide (TMD) monolayer and derive an equation that determines their dispersion relations. The localized modes of two types occur in the zeroth- and first-order stop bands of the crystal and have substantially different properties. The latter type of localized modes, which appear inside the light cone, can be described as a result of coupling of the TMD exciton and an optical Tamm state of the TMD-intercalated photonic crystal. We suggest an experiment for detecting these modes and simulate it numerically.

© 2021 Optical Society of America

Theoretical model of the polarizability due to transitions between exciton states in transition metal dichalcogenides: application to WSe₂

J. C. G. Henriques, M. F. C. Martins Quintela, and N. M. R. Peres
J. Opt. Soc. Am. B 38(7) 2065-2074 (2021)

Exciton dynamics in monolayer transition metal dichalcogenides [Invited]

Galan Moody, John Schaibley, and Xiaodong Xu
J. Opt. Soc. Am. B 33(7) C39-C49 (2016)

Improved photon-pair generation from transition-metal dichalcogenide monolayers embedded in one-dimensional photonic crystals

Tiecheng Wang
J. Opt. Soc. Am. A 35(4) 616-625 (2018)

Valley-dependent vortex emission from exciton-polariton in non-centrosymmetric transition metal dichalcogenide metasurfaces

Mingchen Li, Mingsheng Gao, Qing Zhang, and Yuanjie Yang
Opt. Express 31(12) 19622-19631 (2023)

Splitting of a Tamm plasmon polariton at the interface between a metal and a resonant nanocomposite layer conjugated with a photonic crystal

Anastasia Yu. Avdeeva, Stepan Ya. Vetrov, and Ivan V. Timofeev
J. Opt. Soc. Am. B 38(6) 1792-1797 (2021)