Ultra-Wide Spectral Bandwidth and Enhanced Absorption in a Metallic Compound Grating Covered by Graphene Monolayer

Ultra-narrow metallic armchair graphene nanoribbons

Graphene nanoribbons (GNRs)-narrow stripes of graphene-have emerged as promising building blocks for nanoelectronic devices. Recent advances in bottom-up synthesis have allowed production of atomically well-defined armchair GNRs with different widths and doping. While all experimentally studied GNRs have exhibited wide bandgaps, theory predicts that every third armchair GNR (widths of N=3m+2, w...

Effective medium theory for graphene-covered metallic gratings

We propose an effective medium theory for a one-dimensional periodic array of rectangular grooves covered by a graphene sheet. Parameters of the effective medium model are given by explicit analytical expressions for both major polarizations TM and TE, and for all incident angles. In extraction of this model, we assumed single mode approximation inside the grooves. The effect of non-specular di...

Dynamically tunable extraordinary light absorption in monolayer graphene

Alireza Safaei,1,2 Sayan Chandra,2 Abraham Vázquez-Guardado,2,3 Jean Calderon,4 Daniel Franklin,1,2 Laurene Tetard,1,2 Lei Zhai,2,4 Michael N. Leuenberger,1,2,3 and Debashis Chanda1,2,3,* 1Department of Physics, University of Central Florida, Orlando, Florida 32826, USA 2NanoScience Technology Center, University of Central Florida, Orlando, Florida 32826, USA 3CREOL, The College of Optics and P...

Approaching total absorption at near infrared in a large area monolayer graphene by critical coupling

An Ultra Wide Bandwidth System for In-Home Wireless Networking

In this article we present an ultra-wide bandwidth (UWB) wireless network for in-home cordless networking and wireless distribution of cable TV channels. The article describes the network services, the media access control, channel measurements, and the physical link transmitter and receiver design. The physical link is based on an interference suppressing OFDM (IS-OFDM) in which the total numb...