Open AccessLatching operation in a tunable wavelength filter using Si sampled grating waveguide with ferroelectric liquid crystal cladding
Author(s) -
Katsumi Nakatsuhara,
Akifumi Kato,
Hiroyuki Yoshiki
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.009597
Subject(s) - materials science , grating , optics , cladding (metalworking) , bistability , optoelectronics , wavelength , silicon on insulator , wafer , waveguide , diffraction grating , silicon , physics , metallurgy
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 the fabricated device, which was latching without state-sustaining power, was successfully demonstrated. Its switching and latching characteristics are also reported.