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Optics Letters

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  • Editor: Alan E. Willner
  • Vol. 37, Iss. 7 — Apr. 1, 2012
  • pp: 1205–1207

Plasmonic rainbow rings induced by white radial polarization

Tzu-Hsiang Lan, Yi-Kuan Chung, Jie-En Li, and Chung-Hao Tien  »View Author Affiliations


Optics Letters, Vol. 37, Issue 7, pp. 1205-1207 (2012)
http://dx.doi.org/10.1364/OL.37.001205


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Abstract

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(20nm)/SiO2(500nm)/Au(20nm) sandwich structure. Without the need for angular or spectral scanning, the virtual spectral probe snapshots a wide operation range (n=11.42; λ=400700nm) 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.

© 2012 Optical Society of America

OCIS Codes
(050.1960) Diffraction and gratings : Diffraction theory
(240.6680) Optics at surfaces : Surface plasmons
(260.5430) Physical optics : Polarization

ToC Category:
Diffraction and Gratings

History
Original Manuscript: August 4, 2011
Revised Manuscript: January 18, 2012
Manuscript Accepted: February 3, 2012
Published: March 26, 2012

Citation
Tzu-Hsiang Lan, Yi-Kuan Chung, Jie-En Li, and Chung-Hao Tien, "Plasmonic rainbow rings induced by white radial polarization," Opt. Lett. 37, 1205-1207 (2012)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-37-7-1205


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