Journal
OPTICS EXPRESS
Volume 22, Issue 15, Pages 17776-17781Publisher
OPTICAL SOC AMER
DOI: 10.1364/OE.22.017776
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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 work demonstrates an electrically tunable silicon nitride (SiN) micro-ring resonator with polymer-stabilized blue phase liquid crystals (PSBPLCs) cladding. An external vertical electric field is applied to modulate the refractive index of the PSBPLCs by exploiting its fast-response Kerr effect-induced birefringence. The consequent change in the refractive index of the cladding can vary the effective refractive index of the micro-ring resonator and shift the resonant wavelength. Crystalline structures of PSBPLCs with a scale of the order of hundreds of nanometers ensure that the resonator has a very low optical loss. The measured tuning range is 0.45 nm for TM polarized light under an applied voltage of 150V and the corresponding response time is in the sub-millisecond range with a Q-factor of greater than 20,000. (C) 2014 Optical Society of America
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