Title :
Photo-addressed spatial light modulators using high frequency-driven ferroelectric liquid crystal and amorphous silicon photosensor
Author :
Takahashi, N.S. ; Taura, V. ; Ohyama, T. ; Ikeda, M. ; Hamada, S. ; Kuno, Y. ; Kurita, S. ; Kuriyama, H.
Author_Institution :
Dept. of Electr. Eng., Keio Univ., Yokohama, Japan
Abstract :
Novel spatial light modulators (SLMs) using ferroelectric liquid crystal (FLC) and amorphous silicon (a-Si) are proposed. A novel FLC-SLM enables real-time optical-data processing by applying high-frequency voltage, which the FLC cannot follow, to the device. Two-dimensional array operation has been realized using this FLC-SLM. Furthermore, a doping charge-transfer complex (CTC) to the FLC is effective for improvement of device properties. The device considered has excellent characteristics, as follows: response time of 185 mu s, contrast ratio of 16:1, and spatial resolution of 11 lp/mm (V=+or-10 V, f=200 kHz); and the input image was memorized for more than a week.<>
Keywords :
amorphous semiconductors; elemental semiconductors; ferroelectric liquid crystals; liquid crystal devices; optical information processing; optical modulation; photodetectors; silicon; 10 V; 185 mus; 200 kHz; 2D array; Si; amorphous semiconductor; charge-transfer complex; ferroelectric liquid crystal; photoaddressed spatial light modulator; real-time optical-data processing; Amorphous silicon; Delay; Doping; Ferroelectric materials; Liquid crystals; Log periodic antennas; Optical devices; Optical modulation; Spatial resolution; Voltage;
Conference_Titel :
Display Research Conference, 1991., Conference Record of the 1991 International
Conference_Location :
San Diego, CA, USA
Print_ISBN :
0-7803-0213-3
DOI :
10.1109/DISPL.1991.167457
