Photonic band gap of a graphene-embedded quarter-wave stack

Abstract

Here, we present a mechanism for tailoring the photonic band structure of a quarter-wave stack without changing its physical periods by embedding conductive sheets. Graphene is utilized and studied as a realistic, two-dimensional conductive sheet. In a graphene-embedded quarter-wave stack, the synergic actions of Bragg scattering and graphene conductance contributions open photonic gaps at the center of the reduced Brillouin zone, that nonexistent in conventional quarter-wave stacks. Such photonic gaps show giant, loss-independent density of optical states at the fixed lower-gap-edges, of even-multiple characteristic frequency of the quarter-wave stack. The novel conductive sheets induced photonic gaps provide a new platform for the enhancement of light-matter interactions.

5 pages, 5 figures, accepted for publication in Phys. Rev. B

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• $\mathcal{P}\mathcal{T}$-Symmetric Coherent Perfect Absorber with Graphene
• Scattering of surface plasmon-polaritons in a graphene multilayer photonic crystal with inhomogeneous doping
• Enhanced and controllable reflected group delay based on Tamm surface plasmons with Dirac semimetals