title: Surface plasmon resonance hydrogen sensor based on metallic grating with high sensitivity.
abstract: High sensitivity is obtained at larger resonant incident angle if negative diffraction order of metallic grating is used to excite the surface plasmon. A highly sensitive grating-based surface plasmon resonance (SPR) sensor is designed for the hydrogen detection. A thin palladium (Pd) film deposited on the grating surface is used as transducer. The influences of grating period and the thickness of Pd on the performance of sensor are investigated using rigorous coupled-wave analysis (RCWA) method. The sensitivity as well as the width of the SPR curves and reflective amplitude is considered simultaneously for designing the grating-based SPR hydrogen sensor, and a set of optimized structural parameters is presented. The performance of grating-based SPR sensor is also compared with that of conventional prism-based SPR sensor.
authors: Department of Physics, Anhui Key Laboratory of Optoelectronic Science and Technology, University of Science and Technology of China, Hefei, Anhui, PR China.
authors: Kaiqun
authors: K
authors: Lin
authors: Yonghua
authors: Y
authors: Lu
authors: Junxue
authors: J
authors: Chen
authors: Rongsheng
authors: R
authors: Zheng
authors: Pei
authors: P
authors: Wang
authors: Hai
authors: H
authors: Ming
mesh_terms: D015374:Biosensing Techniques / Q000295:instrumentation*; D004867:Equipment Design; D019544:Equipment Failure Analysis; D006859:Hydrogen / Q000032:analysis* / Q000737:chemistry; D010165:Palladium / Q000737:chemistry*; D012031:Refractometry / Q000295:instrumentation*; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D020349:Surface Plasmon Resonance / Q000295:instrumentation*; D014159:Transducers
chemical_list: D010165:Palladium; D006859:Hydrogen