Results 151 to 160 of about 10,272 (178)

Negative longitudinal component of the Poynting vector of tightly focused optical vortex

International Conference Laser Optics, 2018
we numerically investigated the tight focusing of optical vortices with wavelength λ = 532 nm and left circular polarization by a diffractive lens with a numerical aperture NA = 0.95.
S. Stafeev, A. Nalimov, V. Kotlyar
semanticscholar   +1 more source

Learning through culinary tourism and developing a culinary tourism education strategy

Journal of Tourism and Cultural Change, 2021
A majority of leisure travelers (79%) learn about food and drink when they visit a destination (Stone, M. J., Migacz, S., Garibaldi, R., Stein, N., & Wolf, E. (2020a). 2020 State of the Food Travel Industry Report.
M. J. Stone, Steven Migacz, Erik Wolf
semanticscholar   +1 more source

Study on the algorithm for improving the FFT calculation accuracy of the Richards-Wolf focusing field in the xz plane

Applied Optics and Photonics China
Aiming at the error problems in the computation of the fast Fourier transform (FFT) of the traditional Richards-Wolf focusing field in the xy-plane and xz-plane, this study proposes an improved FFT integration method, which aims to improve the ...
Shuyuan Lv, Yunfei Hao, Wenfeng Luo
semanticscholar   +1 more source

Sharp focusing of a hybridly polarized optical vortex

Computer optics
In this work, using the Richards-Wolf formalism, we consider the sharp focusing of optical vortices with hybrid polarization, which combines the properties of azimuthal and circular polarizations.
S. Stafeev, V. D. Zaitcev, V. Kotlyar
semanticscholar   +1 more source

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

Optics Letters, 2018
Using the Richards-Wolf formulas for an arbitrary circularly polarized optical vortex with an integer topological charge m, we obtain explicit expressions for all components of the electric and magnetic field strength vectors near the focus, as well as ...
V. Kotlyar, A. Kovalev, A. Nalimov
semanticscholar   +1 more source

Focus engineering based on analytical formulae for tightly focused polarized beams with arbitrary geometric configurations of linear polarization.

Journal of The Optical Society of America A-optics Image Science and Vision, 2017
Zhongsheng Man, S. Fu, Gongxiang Wei
semanticscholar   +1 more source

An improved grey wolf optimizer for solving engineering problems

Expert Systems With Applications, 2021
Mohammad H Nadimi-Shahraki, Shokooh Taghian, Seyedali Mirjalili   +2 more
exaly  

Energy Backflow in Tightly Focused Optical Vortex

International Conference on Transparent Optical Networks, 2018
S. Stafeev, A. Nalimov, V. Kotlyar
semanticscholar   +1 more source

Grey wolf genomic history reveals a dual ancestry of dogs

Nature, 2022
Anders Bergström, Laurent A F Frantz, Mikkel H S Sinding   +2 more
exaly  

Analysis of sub-wavelength focusing generated by radially polarized doughnut Gaussian beam

, 2014
Jie Lin, Ran Chen, Yuan Haichao, Peng Jin, M. Čada, Yuan Ma   +5 more
semanticscholar   +1 more source