Journal
OPTICS EXPRESS
Volume 21, Issue 9, Pages 10989-10994Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.21.010989
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- National Science Council of the Republic of China, Taiwan [NSC 99-2119-M-110-006-MY3, NSC 100-2628-E-110-007-MY3, NSC 101-2218-E-110-002]
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This investigation reports observations of optical bistability in a silicon nitride (SiN) micro-ring resonator with azo dye-doped liquid crystal cladding. The refractive index of the cladding can be changed by switching the liquid crystal between nematic (NLC) and photo-induced isotropic (PHI) states by. Both the NLC and the PHI states can be maintained for many hours, and can be rapidly switched from one state to the other by photo-induced isomerization using 532nm and 408nm addressing light, respectively. The proposed device exhibits optical bistable switching of the resonance wavelength without sustained use of a power source. It has a 1.9 nm maximum spectral shift with a Q-factor of over 10000. The hybrid SiN-LC micro-ring resonator possesses easy switching, long memory, and low power consumption. It therefore has the potential to be used in signal processing elements and switching elements in optically integrated circuits. (C) 2013 Optical Society of America
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