Document Detail

Surface plasmon resonance sensor based on spectral interferometry: numerical analysis.
MedLine Citation:
PMID:  23669838     Owner:  NLM     Status:  In-Data-Review    
In this paper, we introduce a numerical simulation of a phase detecting surface plasmon resonance (SPR) scheme based on spectral interference. Based on the simulation, we propose a method to optimize various aspects of SPR sensors, which enables better performance in both measurement range (MR) and sensitivity. In the simulation, four parameters including the spectrum of the broadband light source, incident angle, Au film thickness, and refractive index of the prism coupler are analyzed. The results show that it is a good solution for better performance to use a warm white broadband (625-800 nm) light source, a divergence angle of the collimated incident light less than 0.02°, and an optimized 48 nm thick Au film when a visible broadband light source is used. If a near-IR light source is used, however, the Au film thickness should be somewhat thinner according the specific spectrum. In addition, a wider MR could be obtained if a prism coupler with higher refractive index is used. With all the parameters appropriately set, the SPR MR could be extended to 0.55 refractive index units while keeping the sensitivity at a level of 10<sup>-8</sup>.
Yunfang Zhang; Hui Li; Jingyuan Duan; Ancun Shi; Yuliang Liu
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Applied optics     Volume:  52     ISSN:  1539-4522     ISO Abbreviation:  Appl Opt     Publication Date:  2013 May 
Date Detail:
Created Date:  2013-05-14     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0247660     Medline TA:  Appl Opt     Country:  United States    
Other Details:
Languages:  eng     Pagination:  3253-9     Citation Subset:  IM    
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