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Optics Letters

Optics Letters

| RAPID, SHORT PUBLICATIONS ON THE LATEST IN OPTICAL DISCOVERIES

  • Editor: Alan E. Willner
  • Vol. 38, Iss. 22 — Nov. 15, 2013
  • pp: 4770–4773

Plasmonic petal-shaped beam for microscopic phase-sensitive SPR biosensor with ultrahigh sensitivity

Rong Wang, Luping Du, Chonglei Zhang, Zhongsheng Man, Yijia Wang, Shibiao Wei, Changjun Min, Siwei Zhu, and X.-C. Yuan  »View Author Affiliations


Optics Letters, Vol. 38, Issue 22, pp. 4770-4773 (2013)
http://dx.doi.org/10.1364/OL.38.004770


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Abstract

Differential phase measurement between radially polarized (RP) and azimuthally polarized (AP) beams is an important technique in microscopic surface plasmon resonance (SPR) biosensors as reported in our earlier works [Opt. Lett. 37, 2091 (2012); Appl. Phys. Lett. 102, 011114 (2013)]. However, such a technique suffers complex beam splitting, detection, and data processing procedures for RP and AP beams which may lower the accuracy of phase measurement. In this Letter, a novel plasmonic petal-shaped vector beam is proposed instead of RP and AP beams, greatly simplifying the sensor system and enabling single measurement in differential interferometry. Moreover, an improved ultrahigh sensitivity on the order of 107 refractive index units (RIUs) is experimentally verified in the proposed system.

© 2013 Optical Society of America

OCIS Codes
(120.3180) Instrumentation, measurement, and metrology : Interferometry
(170.3890) Medical optics and biotechnology : Medical optics instrumentation
(240.6680) Optics at surfaces : Surface plasmons
(180.4243) Microscopy : Near-field microscopy
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Instrumentation, Measurement, and Metrology

History
Original Manuscript: September 2, 2013
Revised Manuscript: October 2, 2013
Manuscript Accepted: October 2, 2013
Published: November 12, 2013

Virtual Issues
Vol. 9, Iss. 1 Virtual Journal for Biomedical Optics

Citation
Rong Wang, Luping Du, Chonglei Zhang, Zhongsheng Man, Yijia Wang, Shibiao Wei, Changjun Min, Siwei Zhu, and X.-C. Yuan, "Plasmonic petal-shaped beam for microscopic phase-sensitive SPR biosensor with ultrahigh sensitivity," Opt. Lett. 38, 4770-4773 (2013)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-38-22-4770

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