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Title: Nanoantennas for nanowire photovoltaics

We consider the use of plasmonic nanoantenna elements, hemispherical and cylindrical, for application in semiconductor nanowire (NW) vertical arrays. Using Mie theory and a finite element method, scattering and absorption efficiencies are obtained for the desired enhancement of interaction with light in the NWs. We find an optimal mixture of nanoantennae for efficient scattering of solar spectrum in the NW array. Spectral radiation patterns of scattered light are computed, and, for representing the total response of the nanoantenna-equipped NWs to the solar AM1.5G spectrum, the weighted average of scattering patterns for unpolarized normal incidence is obtained showing an advantageous overall directivity toward the NWs.
Authors:
;  [1]
  1. Center for Optoelectronics and Optical Communications, University of North Carolina Charlotte, 9201 University City Boulevard, Charlotte, North Carolina 28223-0001 (United States)
Publication Date:
OSTI Identifier:
22304432
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 11; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
77 NANOSCIENCE AND NANOTECHNOLOGY; ABSORPTION; ANTENNAS; COMPUTERIZED SIMULATION; EFFICIENCY; FINITE ELEMENT METHOD; INTERACTIONS; NANOSTRUCTURES; NANOWIRES; PHOTOVOLTAIC EFFECT; SCATTERING; SEMICONDUCTOR MATERIALS; SPECTRA; VISIBLE RADIATION