In this work, we theoretically investigate the strong coupling of Tamm Plasmon Polaritons (TPP) in a graphene/DBR/Ag hybrid structure. It is found that TPP can be generated at both upper graphene and lower Ag interfaces, which can strongly couple with each other, allowing strong light-matter interaction with dual-band perfect absorption. Numerical results reveal that resonance frequency of hybrid modes can be tuned by adjusting geometry parameters or dynamically modifying graphene Fermi energy. Coupling strength for the TPP hybrid modes exhibits a large tuning range, from large Rabi splitting to a very narrow induced transparency. The tunable TPP strong coupling with a dual-band perfect absorption in this simple layered system is potential in developing a broad range of graphene-based optoelectronic devices.
In this paper, we have theoretically investigated the absorption response in a monolayer MoS2 covered one-dimensional dielectric grating structure at visible region. Through RCWA calculation, a dual-band total optical absorption has been numerically obtained in this proposed resonance structure. It has been demonstrated that the dual-band total absorption is enabled by the guided resonances with the critical coupling. Moreover, our calculation results also show that the resonance absorption wavelength could be controlled by choosing the proper structural parameters of this system. The ultra-high dual-channel light absorption offered by this simple and compact geometry may lead to the multiple-channel photonic devices in applications of optical detecting, sensing, storage and communication.
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