A Carpet Cloak Device for Visible Light

Details A Carpet Cloak Device for Visible Light A Carpet Cloak Device for Visible Light

2011-04-15

arxiv.org/abs/1104.3169v1

Physics

Optics

Scientific paper

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 nano-porous silicon oxide substrate with a very low refractive index. 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 frequency.

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