Journal
OPTICS LETTERS
Volume 35, Issue 21, Pages 3706-3708Publisher
OPTICAL SOC AMER
DOI: 10.1364/OL.35.003706
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Funding
- United States Air Force Office of Scientific Research (AFOSR)
- National Science Foundation (NSF)
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In this Letter, we create an optical nanoantenna array composed of parasitic plasmonic loops that can enhance radiation characteristics and direct the optical energy successfully. Three metallic loops inspired by the concept of the Yagi-Uda antenna are optimized around the region where they feature high scattering performance to control the radiation beam. The loop geometry, when compared to the dipole configuration, has the benefit of using the available aperture in an effective way to provide higher directivity. The angular emission of the nanoloop array antenna is highly directive, and a directivity of 8.2 dB for upward radiation is established. (C) 2010 Optical Society of America
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