Detection of partial polarization of light beams with dipolar nanocubes

Optics Express
Lasse-Petteri LeppänenTero Setälä

Abstract

We confirm experimentally that the degree and state of polarization of a random, partially polarized electromagnetic beam can be obtained by probing the field with a nanoscatterer. We use a gold nanocube on silicon substrate as a local scatterer and detect the polarization characteristics of the scattered far field, which enables us to deduce the state of partial polarization of the field at the nanoprobe site. In contrast to previous beam characterization methods where spatial resolution is limited by the pixel size of the detector, the accuracy of the current technique is specified by the particle size. Our work is the first step towards polarization-state detection of random optical near fields for which the use of nanoprobes is required.

References

Apr 12, 2001·Journal of Microscopy·T KalkbrennerV Sandoghdar
Jun 1, 2001·Physical Review Letters·L NovotnyT G Brown
Aug 15, 2014·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Lasse-Petteri LeppänenTero Setälä
Feb 1, 2015·Science·Thomas BauerGerd Leuchs

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Citations

Dec 3, 2016·Journal of the Optical Society of America. A, Optics, Image Science, and Vision·Ari T Friberg, Tero Setälä
Sep 29, 2017·Optics Letters·Yahong ChenAri T Friberg

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