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

Abstract

Strong coupling exhibits unique ability to preserve quantum sates between light and matter, which is essential for the development of quantum information technology. To explore the physical mechanism behind this phenomenon, we employ the tight-binding method for expanding the temporal coupled-mode theory, with the absorption spectrum formula of coupled system directly obtained in an analytical way. It reveals all the physical meaning of parameters defined in our theory, and shows how to tailor lineshapes of the coupled systems. Here, we set an example to manipulate the strong coupling in a hybrid structure composed of excitons in monolayer WS${}_2$ and quasi-bound states in the continuum supported by the TiO${}_2$ nanodisk metasurfaces. The simulated results show that a clear spectral splitting appeared in the absorption curve, which can be controlled by adjusting the asymmetric parameter of the nanodisk metasurfaces and well fitted through our theoretical predictions. Our work not only gives a more comprehensive understanding of such coupled systems, but also offers a promising strategy in controlling the strong light-matter coupling to meet diversified application requests.

References in corpus (7)

• Two-Dimensional Material Nanophotonics
• Strong coupling between surface plasmon polaritons and emitters
• Measurement of the optical dielectric function of transition metal dichalcogenide monolayers: MoS2, MoSe2, WS2 and WSe2
• Controlling light absorption of graphene at critical coupling through magnetic dipole quasi-bound states in the continuum resonance
• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• Strong coupling between excitons and magnetic dipole quasi-bound states in the continuum in WS${}_2$-TiO${}_2$ hybrid metasurfaces
• Metasurface Integrated Monolayer Exciton Polariton

Cited by in corpus (7)

• High-efficiency optical frequency mixing in an all-dielectric metasurface enabled by multiple bound states in the continuum
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• Robust enhancement of high-harmonic generation from all-dielectric metasurfaces enabled by polarization-insensitive bound states in the continuum
• Strong coupling between excitons and quasi-Bound states in the continuum in the bulk transition metal dichalcogenides
• Tunable strong plasmon-exciton coupling based on borophene and deep subwavelength perovskite grating
• Efficient photon-pair generation empowered by dual quasi-bound states in the continuum
• Extremely intrinsic chirality in two-dimensional planar waveguide grating induced by quasi-bound states in the continuum