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Applied Optics

Applied Optics


  • Vol. 38, Iss. 31 — Nov. 1, 1999
  • pp: 6550–6555

Small-angle measurement based on surface-plasmon resonance and the use of magneto-optical modulation

Jihua Guo, Zhaoming Zhu, and Weimin Deng  »View Author Affiliations

Applied Optics, Vol. 38, Issue 31, pp. 6550-6555 (1999)

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A new, to our knowledge, optical method for small-angle measurement based on surface-plasmon resonance (SPR) is presented. In this method the high sensitivity of the phase of SPR to the angle of incidence is employed to improve the resolution of the measurement of the angle. Small-angle measurement is performed by the monitoring of the phase shift resulting from the minute change of the angle of incidence with the use of magneto-optical modulation. The validity of this method is demonstrated, and a measurement resolution of 0.2 arc sec is achieved experimentally.

© 1999 Optical Society of America

OCIS Codes
(120.3930) Instrumentation, measurement, and metrology : Metrological instrumentation
(120.5700) Instrumentation, measurement, and metrology : Reflection
(230.3810) Optical devices : Magneto-optic systems
(240.6680) Optics at surfaces : Surface plasmons

Original Manuscript: April 6, 1999
Revised Manuscript: August 2, 1999
Published: November 1, 1999

Jihua Guo, Zhaoming Zhu, and Weimin Deng, "Small-angle measurement based on surface-plasmon resonance and the use of magneto-optical modulation," Appl. Opt. 38, 6550-6555 (1999)

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