AVS 59th Annual International Symposium and Exhibition
    Nanometer-scale Science and Technology Wednesday Sessions
       Session NS-WeA

Paper NS-WeA2
Absorption from Plasmonic Antenna Arrays

Wednesday, October 31, 2012, 2:20 pm, Room 12

Session: Nanophotonics and Plasmonics
Presenter: K.E. O'Brien, University of Florida
Authors: K.E. O'Brien, University of Florida
P. Wang, University of Florida
P.H. Holloway, University of Florida
M.R. Davidson, University of Florida
Correspondent: Click to Email
Photomixing over nano/micro scale plasmonic structures is a novel concept for generating narrow band radiation, specifically in the terahertz (THz) range. The plasmonic structures can serve as antennas for absorbing incoming photons and conversely emit radiation of a lower frequency if it is generated from mixing. In this experiment, antenna structures are excited by two tuned laser diodes to output THz radiation. Various designs for these antennas are have been considered, with presented results focusing on 2 dimensional arrays of elliptical antennas fabricated from Ag using electron-beam lithography and lift-off. The plasmonic antenna arrays exhibit polarization-dependent absorption when excited by visible light in agreement with results from simulations. The effect of varying antenna size on absorption will be discussed, as well as results from photomixing experiments.