2014
DOI: 10.1364/oe.22.009597
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Latching operation in a tunable wavelength filter using Si sampled grating waveguide with ferroelectric liquid crystal cladding

Abstract: A tunable wavelength filter fabricated with a latching function is proposed. The proposed tunable wavelength filter consists of a silicon sampled grating waveguide and ferro-electric liquid crystal (FLC) cladding. The sampled grating waveguide in a silicon-on-insulator (SOI) wafer achieved narrower stop bands than that with the conventional uniform grating structure. Enhanced wavelength shift was also obtained due to the increased effect in FLC by using a thinner silicon core. Bistable switching operation with… Show more

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Cited by 13 publications
(12 citation statements)
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“…These are based on the following: (1) the intrinsic diffractive properties of LC like cholesteric and FLC, (2) deploying the patterned electrode, and (3) defining two or more different alignment regions . All of these diffractive LC structures have been extensively documented recently …”
Section: Electrically Suppressed Helix Ferroelectric Liquid Crystals mentioning
confidence: 99%
See 2 more Smart Citations
“…These are based on the following: (1) the intrinsic diffractive properties of LC like cholesteric and FLC, (2) deploying the patterned electrode, and (3) defining two or more different alignment regions . All of these diffractive LC structures have been extensively documented recently …”
Section: Electrically Suppressed Helix Ferroelectric Liquid Crystals mentioning
confidence: 99%
“…However for FLCs, in addition to the desired diffraction profile because of the periodic electric field, the natural diffraction also appears (Fig. (c)), and thus, it is very difficult to achieve potential diffraction profile for various applications . Furthermore, after few cycle of operations, several geometrical defects appears, just on the top of the patterned ITO, for the inter‐digital electrodes as described in Fig.…”
Section: Electrically Suppressed Helix Ferroelectric Liquid Crystals mentioning
confidence: 99%
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“…Liquid crystal (LC) is a promising integration material which exhibits wide-range and low-power-consumption phase shift while allowing for small device size [9,10,11,12,13,14,15,16,17]. This is because LC molecules generally have a large birefringence of more than 0.1, and their direction can be controlled with external electric fields.…”
Section: Introductionmentioning
confidence: 99%
“…Several LC loaded Si photonic devices have already been reported, such as a Si-ridge-waveguide-base Mach-Zehnder (MZ) optical switch and add-drop multiplexer incorporating a ferroelectric LC [9,10] and a Si-slot-waveguide-base phase shifter which achieved effective concentration of both the optical and electric fields within the waveguide slit filled with LC [11,12,15].…”
Section: Introductionmentioning
confidence: 99%