Enhanced transmission with a graphene-dielectric microstructure at low-terahertz frequencies
|Author||Kaipa, Chandra S. R.
Yakovlev, Alexander B.
Hanson, George W.
Padooru, Yashwanth R.
Medina Mena, Francisco
Mesa Ledesma, Francisco Luis
|Department||Universidad de Sevilla. Departamento de Electrónica y Electromagnetismo
Universidad de Sevilla. Departamento de Física Aplicada I
|Published in||Physical Review B - Condensed Matter and Materials Physics, 85 (24), 245407.|
|Abstract||Here, we report on the transmissivity of electromagnetic waves through a stack of monolayer graphene sheets separated by dielectric slabs at low-terahertz frequencies. It is observed that the multilayer structure possesses ...
Here, we report on the transmissivity of electromagnetic waves through a stack of monolayer graphene sheets separated by dielectric slabs at low-terahertz frequencies. It is observed that the multilayer structure possesses band-gap properties and supports a series of bandpass and band-stop regions, similar to the cases of stacked metallic meshes separated by dielectric slabs at microwave/THz frequencies and a metal-dielectric stack at optical frequencies. The transmission resonances in the bandpass region are identified as coupled Fabry-Pérot resonances associated with the individual cavities of dielectric slabs loaded with graphene sheets. It is also noticed that these resonances lie within a certain characteristic frequency band, independent of the number of layers in the graphene-dielectric stack. The study is carried out using a simple analytical transfer-matrix approach or, equivalently, a circuit-theory model, resulting in the exact solution for the multiple dielectric/graphene sheet surface-conductivity model. Also, an independent verification of the observed phenomena is obtained with commercial numerical simulations.