Sensitive surface plasmon resonance biosensor enhanced by photonic-crystal metallic structure

Fang Wang; Chaoying Chen; Junbin Fang; Shuihua Peng; J. H. Yu; Jun Zhang; Jieyuan Tang; Huihui Lu; Zhe Chen; Yunhan Luo

doi:10.1117/12.2059592

2 June 2014 Sensitive surface plasmon resonance biosensor enhanced by photonic-crystal metallic structure

Fang Wang, Chaoying Chen, Junbin Fang, Shuihua Peng, J. H. Yu, Jun Zhang, Jieyuan Tang, Huihui Lu, Zhe Chen, Yunhan Luo

Proceedings Volume 9157, 23rd International Conference on Optical Fibre Sensors; 91578E (2014) https://doi.org/10.1117/12.2059592
Event: OFS2014 23rd International Conference on Optical Fiber Sensors, 2014, Santander, Spain

Abstract

In this paper, we propose and analytically demonstrate a novel photonic crystal metallic structure, where a photonic crystal (PC) structure is integrated in a total-internal-reflection (TIR) geometry. This unique configuration introduces a new plasmon excitation mechanism, and the excited plasmon modes satisfy the conditions for both resonance modes in PC structure and Plasmon modes in the metallic structure, which makes it possesses a narrow resonance width, smaller minimum reflectance and higher sensitivity comparing with the conventional SPR sensor. The novel and sensitive PC-metallic biosensor will serve as a promising choose for optical biosensing, and in enhanced total-internal-reflection fluorescence microscopy (TIRFM).

Citation Download Citation

Fang Wang, Chaoying Chen, Junbin Fang, Shuihua Peng, J. H. Yu, Jun Zhang, Jieyuan Tang, Huihui Lu, Zhe Chen, and Yunhan Luo "Sensitive surface plasmon resonance biosensor enhanced by photonic-crystal metallic structure", Proc. SPIE 9157, 23rd International Conference on Optical Fibre Sensors, 91578E (2 June 2014); https://doi.org/10.1117/12.2059592

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KEYWORDS

Reflectivity

Surface plasmons

Plasmons

Photonic crystals

Resonance enhancement

Sensors

Biosensors

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