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Updated: Nov 7, 2025

Demonstration of Spin-Multiplexed and Direction-Multiplexed All-Dielectric Visible Metaholograms
Published on: September 25, 2020
Taihui Wu1,2, Jianshe Ma2, Chengchen Wang1,2
1Department of Precision Instrument, Tsinghua University, Beijing 100084, China.
This study presents a novel optical encryption method using computer-generated holograms printed on photopolymers. The technique enables secure, high-density storage of encrypted Quick Response (QR) codes and miniature keys, offering enhanced security and anti-peeping features.
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