Optimal self-referenced sensing using long- and short- range surface plasmons
Optics Express, Vol. 15, Issue 26, pp. 17661-17672 (2007)
http://dx.doi.org/10.1364/OE.15.017661
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Abstract
Dual-mode surface-plasmon resonance (SPR) sensors use both long- and short- range surface plasmon waves to differentiate surface binding interactions from interfering bulk effects. We have optimized the design of these sensors for minimum surface limit of detection (LOD) using a Cramer-Rao lower bound for spectral shift estimation. Despite trade-offs between resonance width, minimum reflectivity, and sensitivity for the two modes, a range of reasonable design parameters provides nearly optimal performance. Experimental verification using biotin-streptavidin binding as a model system reveals that sensitivity and LOD for dual-mode sensors remains competitive with single-mode sensors while compensating for bulk effects.
© 2007 Optical Society of America
OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(280.4788) Remote sensing and sensors : Optical sensing and sensors
ToC Category:
Optics at Surfaces
History
Original Manuscript: October 31, 2007
Revised Manuscript: November 29, 2007
Manuscript Accepted: December 1, 2007
Published: December 12, 2007
Virtual Issues
Vol. 3, Iss. 1 Virtual Journal for Biomedical Optics
Citation
J. T. Hastings, J. Guo, P. D. Keathley, P. B. Kumaresh, Y. Wei, S. Law, and L. G. Bachas, "Optimal self-referenced sensing using long- and
short- range surface plasmons," Opt. Express 15, 17661-17672 (2007)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-26-17661
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