Results 301 to 310 of about 2,790,274 (339)

Interferometric optical vortex array generator

Applied Optics, 2007
Two new interferometric configurations for optical vortex array generation are presented. These interferometers are different from the conventional interferometers in that they are capable of producing a large number of isolated zeros of intensity, and all of them contain optical vortices. Simulation and theory for optical vortex array generation using
Sunil, Vyas, P, Senthilkumaran
openaire   +2 more sources

Optical vortex shaping via a phase jump factor.

Optics Letters, 2019
Topological charge (TC) of an optical vortex (OV) is a crucial parameter. We propose two factors, namely, the phase jump factor and the phase gradient factor, to replace the parameter of TC through unwrapping the TC definition integral.
Haixiang Ma, Xinzhong Li, Hao Zhang, Jie Tang, Hehe Li, M. Tang, Jingge Wang, Y. Cai   +7 more
semanticscholar   +1 more source

Optical vortex trapping of particles

Optics Letters, 1996
We demonstrate three-dimensional trapping of low-index particles (20-microm-diameter hollow glass spheres in water) by using a single, strongly focused, stationary dark optical vortex laser beam. The holographically generated vortex, which is similar to a TEM(01)* mode beam, was also used to trap and form ring patterns of high-index particles.
K T, Gahagan, G A, Swartzlander
openaire   +2 more sources

Generation of a double-ring perfect optical vortex by the Fourier transform of azimuthally polarized Bessel beams.

Optics Letters, 2019
The perfect optical vortex (POV), the ring size being independent of its topological charge, has found potential applications in optical tweezers and optical communications. In this Letter, we report a new kind of POV, termed as double-ring POV (DR-POV),
Yansheng Liang, Shaohui Yan, M. He, Manman Li, Y. Cai, Zhaojun Wang, M. Lei, Baoli Yao   +7 more
semanticscholar   +1 more source

Optical processing with vortex-producing lenses

Applied Optics, 2003
We discuss two types of optical processing using vortex-producing angular phase plates. In the most common spatial-filtering operation, an input object is Fourier transformed (either by Fraunhofer diffraction or with a lens system). The Fourier transform is then multiplied by an angular phase pattern, and the product is again Fourier transformed.
Karlton, Crabtree, Jeffrey A, Davis, Ignacio, Moreno   +2 more
openaire   +2 more sources

3D Printing of Micro-Optic Spiral Phase Plates for the Generation of Optical Vortex Beams

IEEE Photonics Technology Letters, 2019
Optical vortex is a type of structured beam with helical phase wavefronts that carry orbital-angular momentum (OAM) with different topological charge numbers.
Heming Wei, A. K. Amrithanath, S. Krishnaswamy   +2 more
semanticscholar   +1 more source

Ultrasmall Optical Vortex Knots Generated by Spin‐Selective Metasurface Holograms

Advanced Optical Materials, 2019
Tying isolated vortex knots in complex optical fields has been recently realized using spatial light modulators (SLMs). These traditional devices suffer from low efficiency, narrow bandwidth, and they cannot be integrated to nanophotonic systems.
Lei Wang, Weixuan Zhang, Hongxing Yin, Xiangdong Zhang   +3 more
semanticscholar   +1 more source

Optical Vortex Beams and Optical Vortices

Laser & Optoelectronics Progress, 2008
The basic principle, generation,transformation and application of optical vortex beams and optical vortices are briefly summarized, as well as their progress. A brief outlook about the future study and applications of optical vortex beams and optical vortices is discussed.
陆璇辉 LU Xuanhui, 黄慧琴 HUANG Huiqin, 赵承良 ZHAO Chengliang, 王将峰 WANG Jiangfeng, 陈和 CHEN He   +4 more
openaire   +1 more source

Optical vortex with multi-fractional orders

, 2020
Recently, optical vortices (OVs) have attracted substantial attention because they can provide an additional degree of freedom, i.e., orbital angular momentum (OAM). It is well known that the fractional OV (FOV) is interpreted as a weighted superposition
Juntao Hu, Y. Tai, Liuhao Zhu, Zixu Long, M. Tang, Hehe Li, Xinzhong Li, Y. Cai   +7 more
semanticscholar   +1 more source

Topological Charge Inversion of Optical Vortex with Geometric Metasurfaces

Advanced Optical Materials, 2019
The topological charge (TC) inversion of optical vortex is demonstrated along the beam propagation direction by using plasmonic geometric metasurfaces with the initial wave fronts designed from the principle of caustic surface.
Yuchao Zhang, Jie Gao, Xiaodong Yang
semanticscholar   +1 more source