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Method and apparatus of wide-angle optical beamsteering from a nanoantenna phased array

United States Patent

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August 11, 2015
View the Complete Patent at the US Patent & Trademark Office
Nanoantenna Phased Array and Transceiver Next-Generation Automotive
An optical beam-steering apparatus is provided. The apparatus includes one or more optical waveguides and at least one row of metallic nanoantenna elements overlying and electromagnetically coupled to a respective waveguide. In each such row, individual nanoantenna elements are spaced apart along an optical propagation axis of the waveguide so that there is an optical propagation phase delay between successive pairs of nanoantenna elements along the row. The apparatus also includes a respective single electric heating element in thermal contact with each of the waveguides. Each heating element is arranged to heat, substantially uniformly, at least that portion of its waveguide that directly underlies the corresponding row of nanoantenna elements.
14/ 188,269
February 24, 2014
G02F 1/295 (20060101)G02B 5/18 (20060101)G02F 1/01 (20060101)G02F 1/29 (20060101)B82Y 20/00 (20110101)G02B 6/122 (20060101)
STATEMENT REGARDING FEDERALLY SPONSORED RESEARCH OR DEVELOPMENT This invention was developed under Contract DE-AC04-94AL85000 between Sandia Corporation and the U.S. Department of Energy. The U.S. Government has certain rights in this invention