Plasmon-induced transparency in borophene waveguide with strong absorption inhibition at critical-coupled state

Abstract

Abstract We propose a critical-coupled plasmon-induced transparency borophene waveguide system in a communication band with strong absorption inhibition. Intrinsic loss of this scheme is strongly suppressed by coupling between critical-coupled bright mode and dark mode, and then the purpose of reducing absorption can be achieved. Based on numerical calculation by finite-difference time-domain simulations and theoretical analysis via coupled mode theory, the transmission characteristics of this system are investigated. It turns out that this approach effectively minimizes excess absorption losses and maximizes the amount of transmitted energy. Our results may provide an alternative way to design lab-on-a-chip borophene devices.