Application of photonic crystal containing liquid-crystal

Transmission spectrum was calculated using transfer matrix. The results show that by controlling voltage of the modulation layer, it's possible to achieve the movement of the center of the transmission peaks and the switching on and off. When the modulation voltage is less than 5 V, the center of transmission peak can be controlled accurately. When the number of cycles increases, the center of transmission peaks unchanged, but the full width at half maximum (FWHM) narrows, the switching cycle of 6 to 7 is appropriate. It has considerable angle tolerance, therefore it is suitable for the cases of small incident angle. It provides theoretical guidance for this type of photonic crystal to achieve high-frequency switching.