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Journal of the Optical Society of America A

Journal of the Optical Society of America A

| OPTICS, IMAGE SCIENCE, AND VISION

  • Editor: Franco Gori
  • Vol. 31, Iss. 7 — Jul. 1, 2014
  • pp: 1627–1635

Partial polarization of optical beams and near fields probed with a nanoscatterer

Lasse-Petteri Leppänen, Ari T. Friberg, and Tero Setälä  »View Author Affiliations


JOSA A, Vol. 31, Issue 7, pp. 1627-1635 (2014)
http://dx.doi.org/10.1364/JOSAA.31.001627


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Abstract

We consider theoretically the detection of the spectral polarization characteristics of random, partially polarized optical beams and near fields by probing them with a dipolar nanoparticle. We show that measuring the polarization state of the scattered far field with a conventional waveplate–polarizer setup, possibly in several directions, results in the full 3×3 polarization matrix at the probe site. This allows us to deduce the distributions of the degree of polarization of the field and the Stokes parameters of the polarized part of the field with a resolution limited by the probe size. Regarding random near fields we show that, in analogy with a known result on beam fields, a degree of polarization of three-component light fields put forward in recent literature can in some cases be interpreted as a ratio of the intensity in the polarized part of the light to that of the total field. We demonstrate the technique by considering the probing of a Gaussian–Schell model beam and a thermally excited near field. The method extends the current scanning-probe techniques to the detection of partial polarization of random light fields and can find applications in nanophotonics and polarization optics.

© 2014 Optical Society of America

OCIS Codes
(030.1640) Coherence and statistical optics : Coherence
(260.5430) Physical optics : Polarization
(180.4243) Microscopy : Near-field microscopy
(290.5855) Scattering : Scattering, polarization

ToC Category:
Physical Optics

History
Original Manuscript: March 4, 2014
Revised Manuscript: May 28, 2014
Manuscript Accepted: May 28, 2014
Published: June 27, 2014

Citation
Lasse-Petteri Leppänen, Ari T. Friberg, and Tero Setälä, "Partial polarization of optical beams and near fields probed with a nanoscatterer," J. Opt. Soc. Am. A 31, 1627-1635 (2014)
http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-31-7-1627

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