Improving the sensitivity of fiber-optic SPR sensor via radially polarized beam excitation

Jie Yan; Yonghua Lu; Pei Wang; Chun Gu; Rongsheng Zheng; Yong Chen; Hai Ming; Qiwen Zhan

doi:10.3788/COL20090710.0909

Chinese Optics Letters, Volume. 7, Issue 10, 909(2009)

Improving the sensitivity of fiber-optic SPR sensor via radially polarized beam excitation

Jie Yan¹, Yonghua Lu¹, Pei Wang¹, Chun Gu¹, Rongsheng Zheng¹, Yong Chen¹, Hai Ming¹, and Qiwen Zhan²

¹Department of Physics, University of Science and Technology of China, Anhui Key Laboratory of Optoelectronic Science and Technology, Hefei 230026, China

²Electro-Optics Graduate Program, University of Dayton, 300 College Park, Dayton, Ohio 45469-0245, USA

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We study the sensing properties of an intensity-modulated fiber-optic surface plasmon resonance (SPR) sensor using radially polarized beam (RPB). Because of the rotational symmetry of fiber and RPB, surface plasmon can be excited more efficiently at the sensor surface, which results in an obvious improvement of the sensitivity. Our experiments demonstrate that the sensitivity in the case of RPB illumination is three times higher than that of linearly polarized beam illumination.

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060.2370 240.6680 310.5448

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Jie Yan, Yonghua Lu, Pei Wang, Chun Gu, Rongsheng Zheng, Yong Chen, Hai Ming, Qiwen Zhan. Improving the sensitivity of fiber-optic SPR sensor via radially polarized beam excitation[J]. Chinese Optics Letters, 2009, 7(10): 909

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Paper Information

Received: Jul. 14, 2009

Accepted: --

Published Online: Oct. 16, 2009

The Author Email:

DOI:10.3788/COL20090710.0909

Topics

laser devices and laser physics

Lasers and Laser Optics

Laser physics

laser manufacturing

Instrumentation, Measurement and Metrology