Guiding, focusing, and sensing on the subwavelength scale using metallic wire arrays |
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Authors: | Shvets G Trendafilov S Pendry J B Sarychev A |
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Institution: | Department of Physics, The University of Texas at Austin, Austin, Texas 78712, USA. gena@physics.utexas.edu |
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Abstract: | We show that tapered arrays of thin metallic wires can manipulate electromagnetic fields on the subwavelength spatial scale. Two types of nanoscale imaging applications using terahertz and midinfrared waves are enabled: image magnification and radiation focusing. First, the tapered wire array acts as a multipixel TEM endoscope by capturing an electromagnetic field profile created by deeply subwavelength objects at the endoscope's tip and magnifying it for observation. Second, the image of a large mask at the endoscope's base is projected onto a much smaller image at the tip. |
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