Thermodielectric generation of defect modes in a photonic liquid crystal

Yu Cheng Hsiao, Hsiao Tsung Wang, Wei Lee

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)


Photonic defect modes induced by in situ formation of an ill-defined defect layer is demonstrated in a cholesteric liquid crystal (CLC). The local deformation of the one-dimensionally periodic helical structure is achieved by means of the thermodielectric effect, which alters the pitch in the middle of the cholesteric structure. The defect-mode peak in the photonic band gap appears in the transmission spectrum only when the incident circularly polarized light has the same handedness as that of the CLC structure. The wavelength of the deformation-induced defect mode can be tuned upon varying the dielectric heating power by simply applying a frequency-modulated voltage.

Original languageEnglish
Pages (from-to)3593-3599
Number of pages7
JournalOptics Express
Issue number3
Publication statusPublished - Feb 10 2014
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics


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