An ultra-broadband multilayered graphene absorber

Muhammad Amin, Mohamed Farhat, Hakan Bagci

Research output: Contribution to journalArticlepeer-review

204 Scopus citations

Abstract

An ultra-broadband multilayered graphene absorber operating at terahertz (THz) frequencies is proposed. The absorber design makes use of three mechanisms: (i) The graphene layers are asymmetrically patterned to support higher order surface plasmon modes that destructively interfere with the dipolar mode and generate electromagnetically induced absorption. (ii) The patterned graphene layers biased at different gate voltages backedup with dielectric substrates are stacked on top of each other. The resulting absorber is polarization dependent but has an ultra-broadband of operation. (iii) Graphene's damping factor is increased by lowering its electron mobility to 1000cm 2=Vs. Indeed, numerical experiments demonstrate that with only three layers, bandwidth of 90% absorption can be extended upto 7THz, which is drastically larger than only few THz of bandwidth that can be achieved with existing metallic/graphene absorbers. © 2013 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)29938
JournalOptics Express
Volume21
Issue number24
DOIs
StatePublished - Nov 26 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Fingerprint

Dive into the research topics of 'An ultra-broadband multilayered graphene absorber'. Together they form a unique fingerprint.

Cite this