The 32nd International Display Workshops (IDW '25)
Dec 2 - Dec 5, 2025International Convention Center Hiroshima
The 32nd International Display Workshops (IDW '25)
Dec 2 - Dec 5, 2025International Convention Center Hiroshima
[LCTp2-9L]Random Formation of Twelve Types of Liquid Crystal Micropatterns for Unclonable Optical Security
*Sunkuk Kim1, Seong Min Jang1, Young Woo Park1, Jang Kun Song1(1. Sungkyunkwan University (Korea))
Keywords:
Liquid Crystal PUF,Micropatterns Substrate,Topological Defects,Polarized Optical Security
An optical PUF is realized by spin coating nematic liquid crystal onto glass Micropatterns and thermally inducing phase transition. Channel width control (0–9 μm) yields twelve distinct director patterns under competing anchoring. Polarized microscopy captures unique, reproducible fingerprints. This simple process ensures stability, ideal for compact security tags.