Results 251 to 260 of about 1,171,647 (287)

VECTOR PROTON BEAM WRITING SYSTEM

Problems of Atomic Science and Technology, 2022
Vector method for scanning with focused beam of megaelectronvolt-energy in proton-beam writing is described. Vector proton-beam writing method was proven experimentally to have numerous advantages over raster method. Focused beam size and shape are measured by scanning standard copper mesh for e-beam microscopy.
Polozhii, H.E., Ponomarev, A.G., Kolinko, S.V., Rebrov, V.A.   +3 more
openaire   +2 more sources

Coherent beam combining of cylindrical vector beams for power scaling

Optics Letters, 2023
Coherent beam combining (CBC) of cylindrical vector beams (CVBs) based on an active phase controller is proposed and demonstrated. Experimentally, two pieces of spatially variant wave plates (S-wave plate) were employed as vector mode convertors for two individual 1064-nm fiber amplifier channels.
Shixin, Liu, Hang, Liu, Xuepeng, Qi, Wanjing, Peng, Yujun, Feng, Li, Chen, Zhendong, Li, Yinhong, Sun, Yi, Ma, Zhigang, Zhao, Qingsong, Gao, Zhaojun, Liu, Chun, Tang   +12 more
openaire   +2 more sources

VECTORIZATION AND PRECISE REFRACTIONS IN BEAM TRACING

International Journal of Image and Graphics, 2004
In this paper we propose two improvements to the beam tracing method, one is to reduce the final redundant-drawing of pixel fragments into the frame buffer, and the other is to use Snell's law instead of the tangent law. It is well known that the ray tracing scheme is one of the most effective methods for high quality CG image synthesis.
Kazuhiro Koyama, Yoshiaki Tomizawa, Minoru Okada   +2 more
openaire   +2 more sources

Spatio-Spectral Vector Beams

Frontiers in Optics + Laser Science 2023 (FiO, LS), 2023
We present a novel light field with three non-separable degrees of freedom (DoF): space, wavelength, and polarization. The beams structure is only revealed when all DoF’s are defined, analogue to decoherence in non-separable quantum systems.
Lea Kopf, Rafael Barros, Robert Fickler
openaire   +1 more source

Dark-spot formation by vector beams

Optics Letters, 2008
Dark-spot formation is demonstrated by calculating electric-field distribution near the focus produced by focusing higher-order transverse-mode vector beams with radial and azimuthal polarizations in addition to Laguerre-Gaussian beams with linear and circular polarizations.
Yuichi, Kozawa, Shunichi, Sato
openaire   +2 more sources

Efficient generation of vector beams

Laser Beam Shaping XX, 2020
A variety of methods have been developed in the last years to generate vector beams. In this work we will present some techniques that we have developed for the efficient and compact generation of arbitrary polarized vector beams. They are based on the use of geometric-phase elements combined with liquid-crystal on silicon (LCOS) spatial-light ...
Ignacio Moreno Soriano, María del Mar Sánchez-López, Pascuala García-Martínez, David Marco Castillo, Asticio Vargas, Guadalupe López-Morales, Julio César Quiceno-Moreno, José Luis Martínez-Fuentes   +7 more
openaire   +1 more source

Subcycle Pulsed Focused Vector Beams

Physical Review Letters, 2006
An accurate description of a subcycle pulsed beam (SCPB) is presented based on the complex-source model. The fields are exact solutions of Maxwell's equations and applicable to a focused pulsed beam with a pulse duration down to and below one cycle of the carrier wave and with arbitrary polarization state.
Qiang, Lin, Jian, Zheng, Wilhelm, Becker
openaire   +2 more sources

Curvilinear Poincaré vector beams

Chinese Optics Letters, 2021
We develop a method for completely shaping optical vector beams with controllable amplitude, phase, and polarization gradients along three-dimensional freestyle trajectories. We design theoretically and demonstrate experimentally curvilinear Poincare vector beams that exhibit high intensity gradients and accurate state of polarization prescribed along ...
Zheng Yuan, Yuan Gao, Zhuang Wang, Hanchao Sun, Chenliang Chang, Xi-Lin Wang, Jianping Ding, Hui-Tian Wang   +7 more
openaire   +1 more source

Time behavior of focused vector beams

Journal of the Optical Society of America A, 2016
We elucidate the pecularities of time behavior of focused vector optical fields. In particular, for linear or radial incident polarizations, we demonstrate explicitly the π/2 phase delay between transverse and longitudinal components of the field generated at the focus, i.e., their appearance and reaching the peak at different instances of the optical ...
Svetlana N, Khonina, Ilya, Golub
openaire   +2 more sources

Hybrid vector beam generation

SPIE Proceedings, 2011
We experimentally demonstrate the generation of a class of spatially variant polarization beams called hybrid vector beams. Hybrid vector beams have cylindrically symmetric amplitude and a spatially varying degree of polarization ellipticity in their transverse profile about the beam axes, varying from linear to elliptical to circular every 45 ...
Giovanni Milione, Stefan Evans, Robert R. Alfano   +2 more
openaire   +1 more source