Tight focusing of a nonhomogeneously polarized optical vortex

S. S. Stafeev; A. G. Nalimov; L. O'Faolain; M. V. Kotlyar; V. V. Kotlyar

doi:10.1117/12.2315598

26 April 2018 Tight focusing of a nonhomogeneously polarized optical vortex

S. S. Stafeev, A. G. Nalimov, L. O'Faolain, M. V. Kotlyar, V. V. Kotlyar

Proceedings Volume 10717, Saratov Fall Meeting 2017: Laser Physics and Photonics XVIII; and Computational Biophysics and Analysis of Biomedical Data IV; 107170N (2018) https://doi.org/10.1117/12.2315598
Event: Saratov Fall Meeting 2017, 2017, Saratov, Russian Federation

Abstract

In this work, we fabricated and studied the performance of a 100×100-μm four-sector binary subwavelength grating polarizer in a golden film. It was experimentally demonstrated that a linearly polarized 532-nm Gaussian beam reflected at the polarizer was converted to an azimuthally polarized beam. Putting a spiral phase plate (SPP) with the topological charge n = 1 into the azimuthally polarized beam from the micropolarizer was experimentally shown to enable the conversion of the annular intensity pattern into a central intensity peak.

Citation Download Citation

S. S. Stafeev, A. G. Nalimov, L. O'Faolain, M. V. Kotlyar, and V. V. Kotlyar "Tight focusing of a nonhomogeneously polarized optical vortex", Proc. SPIE 10717, Saratov Fall Meeting 2017: Laser Physics and Photonics XVIII; and Computational Biophysics and Analysis of Biomedical Data IV, 107170N (26 April 2018); https://doi.org/10.1117/12.2315598

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