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International Journal of Antennas and Propagation
Volume 2013 (2013), Article ID 245960, 7 pages
http://dx.doi.org/10.1155/2013/245960
Research Article

Glass Superstrate Nanoantennas for Infrared Energy Harvesting Applications

Department of Electrical & Electronics Engineering, Yeditepe University, 34755 Istanbul, Turkey

Received 6 September 2012; Accepted 27 November 2012

Academic Editor: Xianying Wang

Copyright © 2013 Isa Kocakarin and Korkut Yegin. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Several nanoantennas for infrared energy harvesting applications at 30 THz are studied. Contrary to usual antenna designs, we implemented glass superstrate as opposed to glass substrate for better antenna performance. We defined a figure of merit (FOM) which includes antenna fractional bandwidth, peak gain, and half-power beamwidth of the antenna under consideration. Three different antenna structures with glass superstrate and one of them with glass substrate are studied in detail. According to our FOM definition, the Archimedean balanced spiral antenna exhibited superior performance among other structures with less sensitivity to the incoming polarization of the electromagnetic wave.