Inventors:
- Cleveland OH, US
Andy Olah - Spencer OH, US
Zhenpeng Li - Shaker Heights OH, US
Michael Hore - Shaker Heights OH, US
International Classification:
G02B 6/122
G02B 6/02
H04L 9/32
H01S 5/10
Abstract:
A security marking has a physically unclonable function (PUF) wherein the PUF includes a disordered multilayer photonic crystal structure having an electromagnetic transmission and/or reflection spectrum and/or spectra upon receipt of electromagnetic radiation within a photonic bandgap region of the structure that is unique to the structure.