Abstract-Salient Features of Deeply Subwavelength Guiding of Terahertz Radiation in Graphene-Coated Fibers

Artur R. Davoyan* and Nader Engheta*

Department of Electrical and Systems Engineering, University of Pennsylvania, Philadelphia, Pennsylvania 19104, United States

ACS Photonics, Article ASAP

DOI: 10.1021/acsphotonics.5b00503

Publication Date (Web): April 15, 2016

Copyright © 2016 American Chemical Society

*E-mail: davoyan@seas.upenn.edu., *E-mail: engheta@ee.upenn.edu.

http://pubs.acs.org/doi/abs/10.1021/acsphotonics.5b00503

Abstract

Here we discuss theoretically some of the notable features of modal characteristics in the graphene-coated deeply subwavelength fiber waveguide, providing a performance comparison between this guided-wave structure and some other typical THz waveguides. We highlight a cutoff-free propagation of a fundamental graphene-plasmon mode with an effective mode area, which can in principle be smaller than (λ/100)2. We also discuss the phonon-plasmon hybridization that is expected for waveguides with polar dielectric core (e.g., SiO2 and SiC). We believe that this guiding structure, being at the intersection of optics and electronics, may pave the way for a variety of nanoscience applications.