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

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2008

J. T. Hastings, IEEE Sens. J. 8, 170 (2008).

2007

2006

R. Slavik, J. Homola, and H. Vaisocherova, Meas. Sci. Technol. 17, 932 (2006).
[CrossRef]

2003

J. Homola, Anal. Bioanal. Chem. 377, 528 (2003).
[CrossRef]

1999

J. Homola, S. S. Yee, and G. Gauglitz, Sens. Actuators B 54, 3 (1999).
[CrossRef]

1992

J. H. Lowry, J. S. Mendlowitz, and N. S. Subramanian, Opt. Eng. (Bellingham) 31, 1982 (1992).
[CrossRef]

1986

J. J. Burke, G. I. Stegeman, and T. Tamir, Phys. Rev. B 33, 5186 (1986).
[CrossRef]

1981

D. Sarid, Phys. Rev. Lett. 47, 1927 (1981).
[CrossRef]

1972

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

Anal. Bioanal. Chem.

J. Homola, Anal. Bioanal. Chem. 377, 528 (2003).
[CrossRef]

IEEE Sens. J.

J. T. Hastings, IEEE Sens. J. 8, 170 (2008).

Meas. Sci. Technol.

R. Slavik, J. Homola, and H. Vaisocherova, Meas. Sci. Technol. 17, 932 (2006).
[CrossRef]

Opt. Eng. (Bellingham)

J. H. Lowry, J. S. Mendlowitz, and N. S. Subramanian, Opt. Eng. (Bellingham) 31, 1982 (1992).
[CrossRef]

Opt. Express

Phys. Rev. B

P. B. Johnson and R. W. Christy, Phys. Rev. B 6, 4370 (1972).
[CrossRef]

J. J. Burke, G. I. Stegeman, and T. Tamir, Phys. Rev. B 33, 5186 (1986).
[CrossRef]

Phys. Rev. Lett.

D. Sarid, Phys. Rev. Lett. 47, 1927 (1981).
[CrossRef]

Sens. Actuators B

J. Homola, S. S. Yee, and G. Gauglitz, Sens. Actuators B 54, 3 (1999).
[CrossRef]

Other

CRC Handbook of Chemistry and Physics, 87th ed.,D.R.Lide, ed. (CRC Press, 2007).

R. Donipudi, S. Pochiraju, and J. T. Hastings, Proceedings of the 2006 Conference on Lasers and Electrooptics (2006).

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