MUMBAI, India, Feb. 13 -- Intellectual Property India has published a patent application (202611000339 A) filed by Delhi Technological University, New Delhi, on Jan. 2, for 'an optical firewall.'
Inventor(s) include Sharma, Vishakha; Kalra, Yogita; Yadav, Yash; and Sinha, Ravindra Kumar.
The application for the patent was published on Feb. 13, under issue no. 07/2026.
According to the abstract released by the Intellectual Property India: "The present disclosure discloses an optical firewall. The optical firewall comprises a chiral metasurface (102) comprising an array of dual-sided all-dielectric meta-atoms (104). Said meta-atoms (104) are structured to produce two distinct circular dichroism peaks of opposite handedness at adjacent wavelengths. The (100) further comprise a tunable graphene layer (108) integrated with the chiral metasurface (102) to provide active electrical modulation. Said configuration enables spin-selective projection of a predefined optical image (206) under specific left- and right-circularly polarized illumination conditions and a high Fermi level. By adjusting the Fermi level or illumination conditions, the (100) switches to a concealment state where the image vanishes."
Disclaimer: Curated by HT Syndication.
