A Carpet Cloak Device for Visible Light

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 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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Cited by in corpus (20)

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• A diameter--bandwidth product limitation of isolated-object cloaking
• Invisibility on demand based on a generalized Hilbert transform
• Designing a broadband and linear polarization metasurface carpet cloak in the visible
• All-dielectric self-cloaked structures
• Time-of-flight imaging of invisibility cloaks
• General scaling limitations of ground-plane and isolated-object cloaks
• Broadband and Wide-Angle Invisibility with PT-Symmetric 2D-Weyl Semimetal
• Method for arbitrary phase transformation by a slab based on transformation optics and the principle of equal optical path
• Bodies with mirror surface invisible from two points
• Excitation-Transfer Plasmonic Nanosensors based on Dynamical Phase Transitions
• Inverse design of compact optical cloaks and experimental demonstration at microwave frequencies
• Confined Hyperbolic Metasurface Modes for Structured Illumination Microscopy
• Broadband omnidirectional invisibility for sound in three dimensions