期刊
OPTICS EXPRESS
卷 22, 期 19, 页码 22968-22973出版社
OPTICAL SOC AMER
DOI: 10.1364/OE.22.022968
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- National Science Council, Taiwan [NSC101-2221-E-150-007-MY3]
A transmitted-type guided-mode resonance (GMR) sensor is presented for using an electro-optic heterodyne interferometer to tune phase detection sensitivity. The GMR grating waveguide structure is fabricated using a low-cost nanoimprinting SiO2 sol-gel process and sputtering TiO2 film. The phase properties of the GMR sensor are numerically investigated to verify its phase detection capability in a heterodyne interferometer. The phase curves for both transmitted-and reflected-type GMR sensors are experimentally obtained and compared. We conclude that the transmitted-type GMR sensor is more feasible for tuning phase detection sensitivity by rotating the analyzer in the electro-optic heterodyne interferometer. In our experiment, we achieved the GMR sensor phase detection sensitivity as high as 1.8x10(-7) RIU. (C) 2014 Optical Society of America
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