Security use of the chiral photonic film made of helical liquid crystal structures

Wongi Park, Taewoo Ha, Taek Sun Jung, Kyung Ik Sim, Jae Hoon Kim, Joanna M. Wolska, Damian Pociecha, Ewa Gorecka, Teun Teun Kim, Dong Ki Yoon

Research output: Contribution to journalArticlepeer-review

15 Citations (Scopus)


The color change of photonic crystals (PCs) has been widely studied due to their beauty and anti-counterfeiting applications. Herein, we demonstrated security codes based on chiral PCs that cannot be easily mimicked and are quite different from the conventional technology used currently. The chiral PCs can be made by self-assembly and the structural colors change based on the polarization of the light in the transmission mode. These color changes are easily detected in real-time and are useful in the fabrication of anti-counterfeiting patterns that show beautiful and diverse color changes with rotating polarizers. We believe this can provide a new platform in various security and color-based applications.

Original languageEnglish
Pages (from-to)21629-21634
Number of pages6
Issue number42
Publication statusPublished - 2020 Nov 14

Bibliographical note

Publisher Copyright:
© The Royal Society of Chemistry.

All Science Journal Classification (ASJC) codes

  • General Materials Science


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