Strong coupling between excitons and quasibound states in the continuum in bulk transition metal dichalcogenides

Optical bound states in the continuum in periodic structures: mechanisms, effects, and applications

“…Besides using the TMDC monolayer over or inside the periodic structures [151–156] , fabricating bulk TMDC materials to form metasurfaces can efficiently improve the spatial overlap of the cavity mode profile with the emitters to make more significant strength of light–matter interaction. While several theoretical bulk WS2 works give large Rabi splitting that even exceeds 200 meV [157–161] , recent experiments show a tuned strong coupling system with maximum Rabi splitting of 116 meV by constructing BIC-driven metasurfaces composed of bulk WS2 [162] . Besides TMDC materials, perovskite metasurfaces are also worth trying to enhance the strength of light–matter interaction.…”

Large Rabi splitting energy in resonant quasi-BIC WSe2 metasurfaces

“…However, the device structure in their work is relatively complex and faces significant challenges in practical fabrication. Therefore, there is a need for a simple design that can achieve large Rabi splitting values in strong coupling studies [42][43][44][45][46][47][48][49][50][51][52][53].…”

Infrared imaging with nonlinear silicon resonator governed by high-Q quasi-BIC states

“…BICs, originally predicted by von Neumann and Wigner in 1929 [20], have recently attracted attention in nanophotonics as a novel approach for enhancing light-matter interactions [21][22][23][24][25]. To date, BICs have been widely demonstrated and exploited in photonic structures to procure controllable light confinement within nano-resonators [26][27][28][29][30][31][32][33][34]. A widely explored type of BICs is the symmetry-protected BIC existing at the Γ point of a subdiffractive periodic structure.…”