Accession Number:

ADA555883

Title:

A Carpet Cloak for Visible Light

Descriptive Note:

Journal article

Corporate Author:

CALIFORNIA UNIV BERKELEY NANOSCALE SCIENCE AND ENGINEERING CENTER

Report Date:

2011-01-01

Pagination or Media Count:

5.0

Abstract:

We report an invisibility carpet cloak device, which is capable of making an object undetectable by visible light. The cloak is designed using quasi conformal mapping and is fabricated in a silicon nitride waveguide on a specially developed nanoporous silicon oxide substrate with a very low refractive index n is less than 1.25. The spatial index variation is realized by etching holes of various sizes in the nitride layer at deep subwavelength scale creating a local effective medium index. The fabricated device demonstrates wideband invisibility throughout the visible spectrum with low loss. This silicon nitride on low index substrate can also be a general scheme for implementation of transformation optical devices at visible frequencies.

Subject Categories:

  • Optics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE