Strong exciton-photon interaction and lasing of two-dimensional transition metal dichalcogenide semiconductors

Charting the Exciton–Polariton Landscape of WSe2 Thin Flakes by Cathodoluminescence Spectroscopy

“…[13] For these reasons, TMDCs are now a particularly fruitful platform for the observation of strong coupling effects between excitons and photons [14] including the formation of exciton-polariton quasiparticles with effective masses reduced by several orders of magnitude. [15] To realize strong exciton-photon couplings in practice, highquality microcavities, [16][17][18][19] plasmonic nanoantennas, [6] or plasmon polaritons [20][21][22] typically need to be used. The effective interaction between cavity photons and excitons generally promotes the creation of exciton-polaritons, with spontaneous coherence enabling coherent energy transfer and the possible use in optoelectronic devices that, for example, combine ultrafast optical routing with electronics functionalities.…”

Manipulating strong coupling between exciton and quasi-bound states in the continuum resonance

“…In recent years, many researchers have investigated strong coupling between the TMDs and plasmonic/dielectric nanostructures [17][18][19][20][21][22][23][24][25][26][27][28][29][30][31][32] , and developed a general approach to employ the coupled harmonic oscillator model for such hybrid systems, in which nanostructures are treated as an isolated system and the influence of external excitation is ignored. However, the coupled systems are open in nature, where different resonant modes couple not only with each other via near field but also with the external free space 33 .…”

Optical amplification in a CDW-phase of a quasi-two dimensional material

“…Recently, there has been a lot of interest in novel optoelectronic materials and photonic devices and also progresses on TMDC lasers are reported. The discussion focuses mainly on materials like M oT e 2 , M oS 2 , M oSe 2 , W S 2 , W Se 2 , W T e 2 with band gaps in the eV regime, [80][81][82][83][84][85][86][87][88][89] because those materials are the most promising candidates for photonic devices. They possess large exciton binding energies and the maximum achievable gain of those materials exceeds ordinary semiconductor materials like GaAs.…”