title: Tunable phase detection sensitivity of transmitted-type guided-mode resonance sensor in a heterodyne interferometer.
abstract: 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 SiO(2) sol-gel process and sputtering TiO(2) 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 1.8 × 10(-7) RIU.
authors.forename: Wen-Kai
authors.initials: WK
authors.lastname: Kuo
authors.forename: Ning-Chi
authors.initials: NC
authors.lastname: Huang
authors.forename: Hsueh-Ping
authors.initials: HP
authors.lastname: Weng
authors.forename: Hsin-Her
authors.initials: HH
authors.lastname: Yu
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D004867:Equipment Design; D007368:Interferometry / Q000295:instrumentation*; D055095:Optics and Photonics; D012031:Refractometry / Q000295:instrumentation*; D012822:Silicon Dioxide; D020349:Surface Plasmon Resonance / Q000295:instrumentation*
chemical_list: D012822:Silicon Dioxide