Fast-Response Infrared Ferroelectric Liquid Crystal Phase Modulators
نویسندگان
چکیده
A high speed phase modulator based on ferroelectric liquid crystal (FLC) is demonstrated. For uniform alignment and pure phase modulation, we propose a new FLC device using a short helical pitch material in a homeotropic alignment. This device is driven by periodic in-plane electrode stripes implemented on the surface of both cell substrates. As a result, we have obtained a large phase modulation (about 2.3p at k 1⁄4 1.55 lm under E 1⁄4 2.5 V=lm) and fast response time (<200 lsec). Together with the performance characterization of our device, we discuss the alignment breaking effect which occurs near the edges of operating region.
منابع مشابه
High-speed infrared phase modulators using short helical pitch ferroelectric liquid crystals.
A fast phase modulator based on ferroelectric liquid crystal (FLC) is demonstrated and its performances characterized. For uniform alignment and pure phase modulation, we propose a new FLC device configuration using short helical pitch material and homeotropic alignment structure. This device is driven by periodic in-plane electrode stripes implemented on the surface of both cell substrates. As...
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