Silicon nanostructure cloak operating at optical frequencies

By L. Gabrielli, J. Cardenas, C. Poitras, Michal Lipson. 2009

619 citations recorded by the source corpus.

The ability to render objects invisible using a cloak (such that they are not detectable by an external observer) has long been a tantalizing goal1,2,3,4,5,6. Here, we demonstrate a cloak operating in the near infrared at a wavelength of 1,550 nm. The cloak conceals a deformation on a flat reflecting surface, under which an object can be hidden. The device has an area of 225 µm2 and hides a region of 1.6 µm2. It is composed of nanometre-size silicon structures with spatially varying densities across the cloak. The density variation is defined using transformation optics to define the effective index distribution of the cloak. A triangular array of silicon nanostructures is experimentally demonstrated to function as an optical cloaking device, operating in the near-infrared at a wavelength of 1550 nm. This approach could, in principle, be extended to larger areas using fabrication techniques such as nanoimprinting.

Subfields: Aerospace Engineering, Electronic, Optical and Magnetic Materials, Mechanical Engineering

View Paper: https://www.semanticscholar.org/paper/ba933de2c45dd3bd61e07779b63fa7497a1f6930

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In Aerospace Engineering

  1. C. T. Chan
  2. Douglas H. Werner
  3. Do-Hoon Kwon

In Electronic, Optical and Magnetic Materials

  1. C. T. Chan
  2. Ankit Srivastava
  3. Douglas H. Werner
  4. Do-Hoon Kwon

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