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Optical Engineering

Segmented subwavelength silicon gratings manufactured by high productivity microelectronic technologies for linear to radial/azimuthal polarization conversion
Author(s): Thomas Kämpfe; Pierre Sixt; Denis Renaud; Armelle Lagrange; Fabrice Perrin; Olivier Parriaux
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Paper Abstract

A polarization rotation is realized by subwavelength binary gratings, where the round trip phases of the smallest grating modes are fixed to the smallest possible integer numbers of allowing a phase difference of π between TE and TM polarizations and almost 100% transmission. The principle is applied to a polarization transformation in the 1030 to 1064-nm wavelength range, using a segmented polarization rotating element converting a linearly polarized incidence to a radial or azimuthal polarization distribution. The elevated costs of such kinds of polarization transformers based on assembled birefringent crystals are avoided by using mass-fabrication compatible silicon-on-insulator technology on a wafer scale. It shows the general potential of microelectronic technology, concerning the batch manufacturing of wavelength-scale diffractive, grating-based elements for processing free space waves.

Paper Details

Date Published: 8 October 2014
PDF: 5 pages
Opt. Eng. 53(10) 107105 doi: 10.1117/1.OE.53.10.107105
Published in: Optical Engineering Volume 53, Issue 10
Show Author Affiliations
Thomas Kämpfe, Lab. Hubert Curien (France)
Pierre Sixt, MINATEC (France)
Denis Renaud, MINATEC (France)
Armelle Lagrange, MINATEC (France)
Fabrice Perrin, MINATEC (France)
Olivier Parriaux, Lab. Hubert Curien (France)

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