Abstract

We suggest an annular field with linear polarization and a binary sectored phase for the formation of the inverse energy flux with an increased area of action. The possibility of the formation of a reverse energy flux over large areas in the focal domain at tight focusing of a linearly polarized field with the binary phase is shown theoretically and numerically. Moreover, the area increases with the number m. The proposed approach is simple, because linearly polarized radiation is the most common among laser sources and does not require additional devices for polarization transformations. The binary phase also provides ease of manufacture of phase plates with a high diffraction efficiency and high damage threshold. The results will be useful in optical manipulations and processing.

© 2019 Optical Society of America

Energy density and energy flux in the focus of an optical vortex: reverse flux of light energy

Victor V. Kotlyar, Alexey A. Kovalev, and Anton G. Nalimov
Opt. Lett. 43(12) 2921-2924 (2018)

Reverse and toroidal flux of light fields with both phase and polarization higher-order singularities in the sharp focus area

Victor V. Kotlyar, Sergey S. Stafeev, and Alexey A. Kovalev
Opt. Express 27(12) 16689-16702 (2019)

Tight-focusing properties of linearly polarized circular Airy Gaussian vortex beam

Jingli Zhuang, Liping Zhang, and Dongmei Deng
Opt. Lett. 45(2) 296-299 (2020)

Pancharatnam–Berry phase shaping for control of the transverse enhancement of focusing

Zhongsheng Man, Xiujie Dou, and Shenggui Fu
Opt. Lett. 44(2) 427-430 (2019)

Orbital angular momentum of a laser beam behind an off-axis spiral phase plate

Victor Kotlyar, Alexey Kovalev, Alexey Porfirev, and Elena Kozlova
Opt. Lett. 44(15) 3673-3676 (2019)