Space-variant polarization-state manipulation with computer-generated subwavelength gratings

Erez Hasman; Vladimir Kleiner; Gabriel Biener; Avi Niv

doi:10.1117/12.477853

17 January 2003 Space-variant polarization-state manipulation with computer-generated subwavelength gratings

Erez Hasman, Vladimir Kleiner, Gabriel Biener, Avi Niv

Proceedings Volume 4984, Micromachining Technology for Micro-Optics and Nano-Optics; (2003) https://doi.org/10.1117/12.477853
Event: Micromachining and Microfabrication, 2003, San Jose, CA, United States

Abstract

Novel methods for space-variant polarization-state manipulation using subwavelength metal and dielectric gratings are presented. By locally controlling the period and direction of the grating, we show that any desired polarization can be achieved. The methods presented in this paper are generic to any portion of the spectrum, and we present experimental demonstrations of our theory using CO₂ laser radiation at a wavelength of 10.6μm. Moreover, we exploited our computer-generated subwavelength gratings to demonstrate a polarization Talbot self-imaging, as well as nondiffracting periodically space-variant polarization beams, and a unique method for real-time polarization measurement. We also present novel optical phase elements based on the space-domain Pancharatnam-Berry phase. Unlike diffractive and refractive elements, the phase is not introduced through optical path differences, but results from the geometrical phase that accompanies space-variant polarization manipulation. We intoduce and experimentally demonstrate Pancharatnam-Berry phase optical elements (PBOEs) based on computer-generated subwavelength gratings such as polarization beam-splitters, optical switches and spiral phase.

Citation Download Citation

Erez Hasman, Vladimir Kleiner, Gabriel Biener, and Avi Niv "Space-variant polarization-state manipulation with computer-generated subwavelength gratings", Proc. SPIE 4984, Micromachining Technology for Micro-Optics and Nano-Optics, (17 January 2003); https://doi.org/10.1117/12.477853

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