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Superlens and a method for making the same

  • US 7,643,719 B1
  • Filed: 03/10/2004
  • Issued: 01/05/2010
  • Est. Priority Date: 03/14/2003
  • Status: Active Grant
First Claim
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1. An apparatus suitable for controlling the size and the phase of an electromagnetic beam, the apparatus comprising:

  • a. a substrate; and

    b. a vertically Graded Refractive index (vGRIN) multilayer structure deposited on the substrate, the multilayer structure including a vGRIN film and a curved input sidewall and a curved output sidewall, the input sidewall being a sidewall on which the electromagnetic beam is incident on the apparatus, the output sidewall being a sidewall through which the electromagnetic beam leaves the apparatus, wherein the apparatus is used to independently control a vertical focusing and a horizontal focusing of the electromagnetic beam, wherein the vGRIN film has a refractive index distribution n(y), where y is a vertical direction substantially perpendicular to the direction of propagation of the electromagnetic beam.

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