|
|||||
|
|
Measuring physical parameters with surface plasmon resonance heterodyne interferometry |
|
| Authors: | Kun-Huang Chen Jiun-You Lin |
| Institution: | a Department of Electrical Engineering, Feng Chia University, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC b Department of Mechatronics Engineering, National Changhua University of Education, No. 2, Shi-Da Road, Changhua City 50074, Taiwan, ROC c Department of Photonics, Feng Chia University, 100 Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC |
| Abstract: | If the incident angle of a light beam on the boundary surface between the thin metal film of a surface plasmon resonance (SPR) apparatus and a test medium is equal to or very near the resonant angle, then the phase difference between the p- and s-polarizations of the reflected light is related to the associated physical parameter. The phase difference can be measured accurately with heterodyne interferometry. If the relationship between the phase difference and the associated physical parameter is specified, then the associated physical parameter can be estimated from the phase difference data. This method has the benefits of both common-path interferometry and heterodyne interferometry, such as simple structure, high stability, high resolution, easy operation, and rapid real-time measurement. |
| Keywords: | Surface plasmon resonance Heterodyne interferometry Physical parameter |
| 本文献已被 ScienceDirect 等数据库收录！ | |