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- Title
Silicon nanostructure cloak operating at optical frequencies.
- Authors
Gabrielli, Lucas H.; Cardenas, Jaime; Poitras, Carl B.; Lipson, Michal
- Abstract
The ability to render objects invisible using a cloak (such that they are not detectable by an external observer) has long been a tantalizing goal. 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.
- Subjects
NANOSILICON; WAVELENGTHS; SILICON; DENSITY; NANOSTRUCTURED materials
- Publication
Nature Photonics, 2009, Vol 3, Issue 8, p461
- ISSN
1749-4885
- Publication type
Article
- DOI
10.1038/nphoton.2009.117