Share Email Print
cover

Proceedings Paper

Coupled, large-area gold nanowire arrays for nanorectenna energy conversion
Author(s): Richard M. Osgood; Stephen Giardini; Joel Carlson; Brian Kimball; Megan Hoey; Gustavo E. Fernandes; Zhijun Liu; Jin Ho Kim; Jimmy Xu; Walter Buchwald
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

Arrays of "nanorectennas", consisting of nanodiode-coupled nanoantennas, are of interest for converting visible/near-infrared (vis/nir) light into useful direct current. For efficient energy conversion, the nanoantenna array must have a high absorbance (for different polarizations and angles of incidence) and a large fill factor; i.e., the nanoantennas must be tightly packed together. We fabricate hexagonal, close-packed (~ 100 nm nearest neighbor separation), large area (~ 1 cm2) arrays of vertical (e.g., perpendicular to the substrate) Au nanowires (length < 1 μm) on Si, by electrochemically depositing gold into a porous aluminum oxide template (a potentially inexpensive process scalable to large dimensions). Coupling of these nanowires causes a considerable blue-shift of the plasmonic resonance of a single Au nanowire when illuminated by p-polarized light from the infrared to the blue-green portion of the visible spectrum (similar to the s polarization resonance), enabling a nanorectenna with tuned response in the vis/nir regime, whose absorption is roughly polarization-independent and relatively insensitive to angle of incidence. We measure the off-normal reflectivity of these arrays, compare with simulations, and present experimental data on rectification and power generation in the attached Au-Si Schottky nanodiodes.

Paper Details

Date Published: 11 September 2010
PDF: 14 pages
Proc. SPIE 7757, Plasmonics: Metallic Nanostructures and Their Optical Properties VIII, 775715 (11 September 2010); doi: 10.1117/12.860174
Show Author Affiliations
Richard M. Osgood, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Stephen Giardini, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Joel Carlson, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Brian Kimball, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Megan Hoey, U.S. Army Natick Soldier Research, Development and Engineering Ctr. (United States)
Gustavo E. Fernandes, Brown Univ. (United States)
Zhijun Liu, Brown Univ. (United States)
Jin Ho Kim, Brown Univ. (United States)
Jimmy Xu, Brown Univ. (United States)
Walter Buchwald, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 7757:
Plasmonics: Metallic Nanostructures and Their Optical Properties VIII
Mark I. Stockman, Editor(s)

© SPIE. Terms of Use
Back to Top