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Applied Optics

Applied Optics


  • Vol. 37, Iss. 10 — Apr. 1, 1998
  • pp: 1747–1751

Optical phase-shift detection of surface plasmon resonance

Shuai Shen, Tong Liu, and Jihua Guo  »View Author Affiliations

Applied Optics, Vol. 37, Issue 10, pp. 1747-1751 (1998)

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A heterodyne optical measurement system for studying the phase shift of surface plasmon resonance (SPR) is presented. The system utilizes a frequency-stabilized Zeeman laser as a detection light source and is suitable for real-time phase measurement in SPR-sensing applications. The phase shift in an angular dispersion SPR excitation setup was measured ranging from +180° to -120° around the SPR excitation region. The experimental results fit well with the theoretical analysis. Compared with the reflection coefficient variation that is widely investigated in SPR studies, phase shift is estimated to provide a higher sensitivity to sensor systems and more information about the resonance phenomenon.

© 1998 Optical Society of America

OCIS Codes
(040.2840) Detectors : Heterodyne
(050.5080) Diffraction and gratings : Phase shift
(240.6680) Optics at surfaces : Surface plasmons

Original Manuscript: September 11, 1997
Revised Manuscript: November 24, 1997
Published: April 1, 1998

Shuai Shen, Tong Liu, and Jihua Guo, "Optical phase-shift detection of surface plasmon resonance," Appl. Opt. 37, 1747-1751 (1998)

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