A Carpet Cloak Device for Visible Light
Majid Gharghi, Christopher Gladden, Thomas Zentgraf, Yongmin Liu,, Xiaobo Yin, Jason Valentine, Xiang Zhang

TL;DR
This paper presents a visible light invisibility cloak made with silicon nitride that uses quasi conformal mapping and nano-porous substrates to achieve broadband, low-loss invisibility across the visible spectrum.
Contribution
The work introduces a novel fabrication method for a visible light cloak using nano-porous silicon oxide and silicon nitride, enabling broadband invisibility with low loss.
Findings
Demonstrates wideband invisibility in the visible spectrum
Uses nano-porous silicon oxide for low refractive index
Achieves low-loss, broadband cloaking
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.
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
