Title :
High-sensitivity Optical Sensor Based on Surface Plasmon Resonance Enhanced Goos-Hÿnchen shift
Author :
Yang, Xiaoyan ; Liu, Deming ; Wenchong Xie
Author_Institution :
Huazhong Univ. of Sci. & Technol., Wuhan
Abstract :
A new optical sensor based on surface plasmon resonance (SPR) enhanced Goos-Hanchen(GH) shift is presented. Compared with the traditional SPR techniques, the new method provides higher sensitivity to sensor system. Theoretical simulations show the refractive index (RI) detection sensitivity of the SPR sensor based on the GH shift measurement has a strong dependence on the thickness of the metal film. When the optimal thickness of the metal film is selected, the RI resolution of the SPR sensor is predicted to be 2.2 times 10-7 refractive index units (RIU). Furthermore, it is found that the incidence angle can be used as a parameter to adjust operating range of the sensor to different refractive index ranges.
Keywords :
optical sensors; refractive index measurement; surface plasmon resonance; Goos-Hanchen shift; SPR sensor; detection sensitivity; high-sensitivity optical sensor; metal film; optimal thickness; refractive index; surface plasmon resonance; Dielectric measurements; Intensity modulation; Optical films; Optical polarization; Optical reflection; Optical sensors; Optical surface waves; Plasmons; Refractive index; Resonance; Goos-Hÿnchen shift; Optical sensor; Surface plasmon resonance;
Conference_Titel :
Optoelectronic and Microelectronic Materials and Devices, 2006 Conference on
Conference_Location :
Perth, WA
Print_ISBN :
978-1-4244-0578-7
Electronic_ISBN :
978-1-4244-0578-7
DOI :
10.1109/COMMAD.2006.4429883
