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Proceedings Paper

A subwavelength Stokes polarimeter on a silicon chip
Author(s): A. Espinosa Soria; Francisco J. Rodríguez-Fortuño; Amadeu Griol; Alejandro Martínez
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Paper Abstract

Measuring the state of polarization (SoP) of light beams is of paramount importance in many scientific and technological disciplines, including chemistry, biosensing, astronomy and optical communications. Commercial polarimeters are built by using bulky and expensive optical elements, including half-wave plates or grid polarizers, with little prospect for miniaturization. Inspired by the concept of spin-orbit coupling, here we introduce a nanophotonic polarimeter that measures the full SoP – Stokes parameters – of a light beam over an ultrabroad wavelength range. The active region of the device, formed by a metallic nanoantenna on top of a silicon waveguide crossing, is less than a square wavelength, one order of magnitude smaller than polarimeters based on metasurfaces and many orders of magnitude smaller than commercial devices. Our approach is universal and therefore applicable to any wavelength regime and technological platform, opening a new route for miniaturized polarimeters.

Paper Details

Date Published: 18 April 2016
PDF: 7 pages
Proc. SPIE 9884, Nanophotonics VI, 98841I (18 April 2016); doi: 10.1117/12.2227634
Show Author Affiliations
A. Espinosa Soria, Univ. Politècnica de València (Spain)
Francisco J. Rodríguez-Fortuño, King's College London (United Kingdom)
Amadeu Griol, Univ. Politècnica de València (Spain)
Alejandro Martínez, Univ. Politècnica de València (Spain)

Published in SPIE Proceedings Vol. 9884:
Nanophotonics VI
David L. Andrews; Jean-Michel Nunzi; Andreas Ostendorf, Editor(s)

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