Title :
Tuning the Scattering Response of the Optical Nano Antennas Using Graphene
Author :
Mehta, Bhaven ; Zaghloul, Mona E.
Author_Institution :
Dept. of Electr. & Comput. Eng., George Washington Univ., Washington, DC, USA
Abstract :
In this paper, we propose the tuning of the optical nano antenna in the visible spectrum using graphene. A dipole structure for the nano antenna is considered with the resonating wavelength at the VIS-NIR spectrum range. Resonance is determined using the scattering characteristics of the dipole antenna. Placing monolayer and bilayers of graphene sheets on top of the optical nano antenna will result in a change in the resonating wavelength. The input impedance of the resultant structures is calculated. The FDTD simulation results for resonance characteristics were verified with the experiment results. Such architecture of graphene on top of the dipole nano antennas can be used for different biological and chemical gas sensors.
Keywords :
dipole antennas; finite difference time-domain analysis; graphene; light scattering; metamaterial antennas; nanophotonics; optical tuning; FDTD simulation; VIS-NIR spectrum range; biological sensors; chemical gas sensors; dipole antenna; graphene sheets; input impedance; optical nanoantennas; resonance characteristics; resonating wavelength; scattering characteristics; scattering response; tuning; visible spectrum; Dipole antennas; Finite difference methods; Graphene; Mathematical model; Optical device fabrication; Optical imaging; Optical scattering; Graphene; nano antennas; plasmonics;
Journal_Title :
Photonics Journal, IEEE
DOI :
10.1109/JPHOT.2014.2300501
