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Journal of the Optical Society of America B

Journal of the Optical Society of America B

| OPTICAL PHYSICS

  • Editor: Grover Swartzlander
  • Vol. 30, Iss. 4 — Apr. 1, 2013
  • pp: 806–811

Polarimetric measurement of optically perturbed surface plasmonic field

Shankar Pidishety and Nirmal K. Viswanathan  »View Author Affiliations


JOSA B, Vol. 30, Issue 4, pp. 806-811 (2013)
http://dx.doi.org/10.1364/JOSAB.30.000806


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Abstract

A surface plasmon (SP) field excited at the metal–air interface by a TM-polarized laser and perturbed by an unpolarized, weakly absorbing laser beam leads to an understanding of the SP decay field’s contribution to specular reflection at the near field. The locally perturbed near field results in a spatial variation of the magnitude of the SP decay field due to the photo-thermal effect on the excited SP wave. The SP decay field of different magnitude interferes with the specular reflected field, affecting its polarization and phase characteristics. The changes in the resulting far field are polarimetrically analyzed to extract the polarization ellipse parameters and the phase changes in the entire plasmonic field region. The obtained results are promising for potential applications in all-optical polarization modulators and switches for optical computing.

© 2013 Optical Society of America

OCIS Codes
(050.5080) Diffraction and gratings : Phase shift
(120.5060) Instrumentation, measurement, and metrology : Phase modulation
(140.6810) Lasers and laser optics : Thermal effects
(240.0240) Optics at surfaces : Optics at surfaces
(240.0310) Optics at surfaces : Thin films
(240.6680) Optics at surfaces : Surface plasmons

ToC Category:
Optics at Surfaces

History
Original Manuscript: December 20, 2012
Revised Manuscript: January 29, 2013
Manuscript Accepted: February 5, 2013
Published: March 6, 2013

Citation
Shankar Pidishety and Nirmal K. Viswanathan, "Polarimetric measurement of optically perturbed surface plasmonic field," J. Opt. Soc. Am. B 30, 806-811 (2013)
http://www.opticsinfobase.org/josab/abstract.cfm?URI=josab-30-4-806

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