Phys. Rev. Lett. 99, 053903 (2007) [4 pages]Guiding, Focusing, and Sensing on the Subwavelength Scale Using Metallic Wire ArraysReceived 5 February 2007; revised 16 May 2007; published 2 August 2007 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. © 2007 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.99.053903
DOI:
10.1103/PhysRevLett.99.053903
PACS:
42.82.Et, 41.20.Jb, 42.79.Pw, 84.40.Az
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