Strong light-matter coupling in MoS$_2$
Abstract
Polariton-based devices require materials where light-matter coupling under ambient conditions exceeds losses, but our current selection of such materials is limited. Here we measured the dispersion of polaritons formed by the and excitons in thin MoS slabs by imaging their optical near fields. We combined fully tunable laser excitation in the visible with a scattering near-field optical microscope to excite polaritons and image their optical near fields. We obtained the properties of bulk MoS from fits to the slab dispersion. The in-plane excitons are in the strong regime of light-matter coupling with a coupling strength (meV) that exceeds their losses by at least a factor of two. The coupling becomes comparable to the exciton binding energy, which is known as very strong coupling. MoS and other transition metal dichalcogenides are excellent materials for future polariton devices.
Keywords
Cite
@article{arxiv.2103.10867,
title = {Strong light-matter coupling in MoS$_2$},
author = {Patryk Kusch and Niclas S. Mueller and Martin T. Hartmann and Stephanie Reich},
journal= {arXiv preprint arXiv:2103.10867},
year = {2021}
}