Subwavelength gratings for polarization conversion and focusing of laser light
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Accepted Version
Date
2017-09-17
Authors
Stafeev, Sergey S.
Kotlyar, Victor V.
Nalimov, Anton G.
Kotlyar, Maria V.
O'Faolain, Liam
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Published Version
Abstract
We review thin micro-optics components with nanostructured microreliefs intended to control the polarization and phase of laser light. These components include transmission and reflection subwavelength diffraction gratings characterized by spatially −varying groove directions and fill factors, with the microrelief period and depth remaining approximately unchanged. In the visible spectrum, the microrelief features may vary in size from dozens to hundreds of nanometers. Segmented diffractive micropolarizers for linear to radial/azimuthal polarization conversion and subwavelength microlenses for tightly focusing the laser light are discussed in detail. Examples of particular micropolarizers and microlenses fabricated in amorphous silicon films are also given.
Description
Keywords
Subwavelength grating , Metasurface , Pancharatnam–berry phase , Radially polarized light , Azimuthally polarized light , Metalens
Citation
Stafeev, S. S., Kotlyar, V. V., Nalimov, A. G., Kotlyar, M. V. and O’Faolain, L. (2017) 'Subwavelength gratings for polarization conversion and focusing of laser light', Photonics and Nanostructures - Fundamentals and Applications, 27, pp. 32-41. doi:10.1016/j.photonics.2017.09.001