Dual-mode surface-plasmon-resonance sensors using angular interrogation
Optics Letters, Vol. 33, Issue 5, pp. 512-514 (2008)
http://dx.doi.org/10.1364/OL.33.000512
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Abstract
Surface-plasmon-resonance (SPR) sensors are widely used in biological, chemical, medical, and environmental sensing. SPR sensors supporting two surface-plasmon modes can differentiate surface binding interactions from bulk index changes at a single sensing location. We present a new approach to dual-mode SPR sensing that offers improved differentiation between surface and bulk effects. By using an angular interrogation, both long- and short-range surface plasmons are simultaneously excited at the same location and wavelength but at different angles. Initial experiments indicate that angular interrogation offers at least a factor of 3.6 improvement in surface and bulk cross-sensitivity compared to wavelength-interrogated dual-mode SPR sensors.
© 2008 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: December 12, 2007
Revised Manuscript: January 22, 2008
Manuscript Accepted: January 24, 2008
Published: February 28, 2008
Virtual Issues
Vol. 3, Iss. 4 Virtual Journal for Biomedical Optics
Citation
Jing Guo, P. Donald Keathley, and J. T. Hastings, "Dual-mode surface-plasmon-resonance sensors using angular interrogation," Opt. Lett. 33, 512-514 (2008)
http://www.opticsinfobase.org/vjbo/abstract.cfm?URI=ol-33-5-512
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