An electrically tunable and polarizer-free photonic device is developed using a one-dimensional photonic crystal (PC) infiltrated with dual-frequency cholesteric liquid crystal (DFCLC) as a defect layer. The PC/DFCLC hybrid cell allows the employment of various frequency-modulated voltage pulses to regulate defect modes and switch between stable states. This device possesses many alluring features such as rapid bistable switching, intensity tunability, and wavelength tunability in the defect modes, and it requires no polarizers. It can be used as a filter, fast-speed shutter, or light-intensity modulator.
© 2011 Optical Society of America
Original Manuscript: April 6, 2011
Revised Manuscript: June 8, 2011
Manuscript Accepted: June 9, 2011
Published: July 11, 2011
Yu-Cheng Hsiao, Chong-Yin Wu, Chih-Heng Chen, Victor Ya. Zyryanov, and Wei Lee, "Electro-optical device based on photonic structure with a dual-frequency cholesteric liquid crystal," Opt. Lett. 36, 2632-2634 (2011)