Bichromatic tuning of reflection bands in integrated CLC reflectors for optical switches, gates, and logic

摘要

This study investigates the bichromatic tuning of cholesteric liquid crystal (CLC) reflection bands from reflectors containing chiral azo dopants. Because the chiral azo molecules change their helical twist power in reversible photoisomerization, the reflection bands of the CLCs are modulated using purple and green laser beams. The CLC reflectors are integrated into an optical gate that can be used to modulate output spectra. We also apply the integrated system in optical switching and logic.