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Proceedings Paper

Paired surface plasma waves biosensor using degree of coherence
Author(s): Chien-Wa Ho; Sheng-Yi Chang; Nai-Chuan Chen; Ying-Feng Chang; Chien Chou
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Paper Abstract

Degree of coherence (DOC) of a paired surface plasma waves (PSPWs) in the paired surface plasma waves biosensor (PSPWB) is proposed and discussed in which a paired of surface plasma waves are excited by using a pair of highly spatial and temporal correlated P-polarized waves in a SPR device of the Kretschmann configuration. The heterodyne signal from reflected paired P-polarized laser beam is generated where the visibility of the signal is proportional to DOC of PSPWs in term of the ratio of AC and DC components of the signal. The experimental result shows that the DOC of PSPWs versus incident angle of laser beam which relates to intrinsic phonon distribution in metal film becomes much sensitive than conventional amplitude or intensity sensitive surface plasmon resonance (SPR) biosensor. Finally, the dynamic range of protein-protein interaction at ultralow concentrations is discussed.

Paper Details

Date Published: 21 February 2013
PDF: 6 pages
Proc. SPIE 8597, Plasmonics in Biology and Medicine X, 85970D (21 February 2013); doi: 10.1117/12.2001430
Show Author Affiliations
Chien-Wa Ho, National United Univ. (Taiwan)
Sheng-Yi Chang, Ming Chi Univ. of Technology (Taiwan)
Nai-Chuan Chen, Chang Gung Univ. (Taiwan)
Ying-Feng Chang, Chang Gung Univ. (Taiwan)
Chien Chou, Chang Gung Univ. (Taiwan)

Published in SPIE Proceedings Vol. 8597:
Plasmonics in Biology and Medicine X
Tuan Vo-Dinh; Joseph R. Lakowicz, Editor(s)

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