PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The numerical studies of laser radiation focusing by the complex subwavelength diffractive axicons with different relief heights and refractive indices of axicon rings in the near zone are carried out in this paper (3D propagation). The Super- Gauss and an optical vortex with circular polarization were considered as the input laser radiation. It should be noted that the change in the height and refractive index of the relief of the optical elements made it possible, in the general case, to obtain better focusing in comparison with a conventional diffractive axicon with the same numerical aperture. In particular, it turned out to reduce the focal spot size by 15 percent for the case of an optical vortex.
Dmitry A. Savelyev
"The sub-wavelength complex micro-axicons for focal spot size reducing using high-performance computer systems", Proc. SPIE 11769, Metamaterials XIII, 1176918 (18 April 2021); https://doi.org/10.1117/12.2589220
ACCESS THE FULL ARTICLE
INSTITUTIONAL Select your institution to access the SPIE Digital Library.
PERSONAL Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.
The alert did not successfully save. Please try again later.
Dmitry A. Savelyev, "The sub-wavelength complex micro-axicons for focal spot size reducing using high-performance computer systems," Proc. SPIE 11769, Metamaterials XIII, 1176918 (18 April 2021); https://doi.org/10.1117/12.2589220