Forming near-field helical intensity using a binary vortical axicon

Sergey A. Degtyarev; Svetlana N. Khonina

doi:10.1117/12.2070413

6 January 2015 Forming near-field helical intensity using a binary vortical axicon

Sergey A. Degtyarev, Svetlana N. Khonina

Proceedings Volume 9450, Photonics, Devices, and Systems VI; 945013 (2015) https://doi.org/10.1117/12.2070413
Event: Photonics Prague 2014, 2014, Prague, Czech Republic

Abstract

A helical intensity distribution was created in a near-field when Gaussian laser beam was focused by a binary phase spiral axicon with high numerical aperture. It was shown by 3D-simlation using the Comsol software and natural experiments with near-field microscope NT-MDT Integra Spectra. Experimental measurements and numerical simulations are in good agreement.

Citation Download Citation

Sergey A. Degtyarev and Svetlana N. Khonina "Forming near-field helical intensity using a binary vortical axicon", Proc. SPIE 9450, Photonics, Devices, and Systems VI, 945013 (6 January 2015); https://doi.org/10.1117/12.2070413

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