Document Detail


Plasmonic rainbow rings induced by white radial polarization.
MedLine Citation:
PMID:  22466196     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
This Letter presents a scheme to embed both angular/spectral surface plasmon resonance (SPR) in a unique far-field rainbow feature by tightly focusing (effective NA=1.45) a polychromatic radially polarized beam on an Au (20  nm)/SiO<sub>2</sub> (500  nm)/Au (20  nm) sandwich structure. Without the need for angular or spectral scanning, the virtual spectral probe snapshots a wide operation range (n=1-1.42; λ=400-700  nm) of SPR excitation in a locally nanosized region. Combined with the high-speed spectral analysis, a proof-of-concept scenario was given by monitoring the NaCl liquid concentration change in real time. The proposed scheme will certainly has a promising impact on the development of objective-based SPR sensor and biometric studies due to its rapidity and versatility.
Authors:
Tzu-Hsiang Lan; Yi-Kuan Chung; Jie-En Li; Chung-Hao Tien
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Optics letters     Volume:  37     ISSN:  1539-4794     ISO Abbreviation:  Opt Lett     Publication Date:  2012 Apr 
Date Detail:
Created Date:  2012-04-02     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7708433     Medline TA:  Opt Lett     Country:  United States    
Other Details:
Languages:  eng     Pagination:  1205-7     Citation Subset:  IM    
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