Results 11 to 20 of about 3,652 (291)

Generalized Jones Calculus for Vortex, Vector, and Vortex-Vector Beam Transformations

, 2021
The work defines the general form of the Jones vector and establishes the Jones matrix for polarizers, wave plates, Faraday rotators, Q-plates, and spiral phase plates. We establish the generalized Jones calculus for vortex, vector, and vortex-vector beam transformations. Systematic formalism presents the theoretical arrangements in the manipulation of
Kuan, Wen-Hsuan, Lin, Kuei-Huei, Wang, Chang-Wen, Hung, Ni-Hsuan   +3 more
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Coherence-induced polarization effects in vector vortex beams [PDF]

Optics Letters, 2020
We demonstrate theoretically and experimentally coherence-induced polarization changes in higher-order vector vortex beams (VVBs) with polarization singularity. The prominent depolarization on decreasing the transverse correlation width in a focused partially coherent VVB provides a means to shape the intensity profile and degree of polarization (DOP ...
Stuti Joshi, Saba N. Khan, null Manisha, P. Senthilkumaran, Bhaskar Kanseri   +4 more
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Inverse Energy Flux in Tight Focusing of Vector Vortex Beam

Photonics, 2023
In this paper, we focus on the study of the negative energy flow in the tight focusing of a radially polarized vortex beam. We know that, because of the coupling of the polarization state and the vortex charge, the on-axis energy flow in the focal region
Ruixiang Chen, Tiegen Song, Yuee Luo, Hehe Li, Xinzhong Li   +4 more
doaj   +2 more sources

Terahertz vortex beam generation by infrared vector beam rectification [PDF]

Journal of the Optical Society of America B, 2018
We report on the conversion of an infrared vector beam into terahertz vortex beams using a ⟨110⟩-cut ZnTe cubic crystal. First, we provide a theoretical analysis demonstrating how an infrared vector beam with the azimuthal order l can be transformed into a terahertz beam endowed with an orbital angular moment content that consists of optical vortices ...
Dhaybi, Ali, Degert, Jerome, Brasselet, Etienne, Abraham, Emmanuel, Freysz, Eric   +4 more
openaire   +3 more sources

Vector Vortex Beam-Enabled Edge Microscopy with Dynamic Orientation Selectivity. [PDF]

ACS Photonics
Edge enhancement is an image processing technique that aids in highlighting structural details, especially in samples with weak scattering properties or low intrinsic contrast.
Ahmed H, Ansari MA, Paterson L, Yang X, Chen X.   +4 more
europepmc   +2 more sources

Effect of Twisting Phases on the Polarization Dynamics of a Vector Optical Field

Photonics, 2022
The effect of twisting phases on the polarization dynamics of a vector vortex beam with a spatially variant state of polarization (SoP) is investigated theoretically and experimentally.
Quanbin Liu, Khian-Hooi Chew, Yingqi Huang, Caixia Liu, Xiaobo Hu, Yuhua Li, Rui-Pin Chen   +6 more
doaj   +1 more source

Structured air lasing of N2 +

Communications Physics, 2023
Air lasing is a simple and promising technique to efficiently produce coherent light in the atmosphere. Yet, its capability to obtain structured light like optical vortices or vector beams is still unexplored.
Jingsong Gao, Xiang Zhang, Yang Wang, Yiqi Fang, Qi Lu, Zheng Li, Yi Liu, Chengyin Wu, Qihuang Gong, Yunquan Liu, Hongbing Jiang   +10 more
doaj   +1 more source

Machine Learning-Based Classification of Vector Vortex Beams [PDF]

Physical Review Letters, 2020
Structured light is attracting significant attention for its diverse applications in both classical and quantum optics. The so-called vector vortex beams display peculiar properties in both contexts due to the non-trivial correlations between optical polarization and orbital angular momentum. Here we demonstrate a new, flexible experimental approach to
Giordani, Taira, Suprano, Alessia, Polino, Emanuele, Acanfora, Francesca, Innocenti, Luca, Ferraro, Alessandro, Paternostro, Mauro, Spagnolo, Nicolò, Sciarrino, Fabio   +8 more
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Direct Generation of Radially Polarized Vector Vortex Beam with an Exciton-Polariton Laser [PDF]

, 2020
Vector vortex beams are a class of optical beams with singularities in their space-variant polarization. Vector vortex beam lasers have applications in many areas including imaging and communication, where vertical-cavity lasers emitting Gaussian beams ...
Christian Schneider (445807), Seonghoon Kim (1559083), Jiaqi Hu (1425412), Hui Deng (455823), Sven Höfling (4234357)   +4 more
core   +2 more sources

Entangled vector vortex beams [PDF]

Physical Review A, 2016
Light beams having a vectorial field structure, or polarization, that varies over the transverse profile and a central optical singularity are called vector vortex (VV) beams and may exhibit specific properties such as focusing into "light needles" or rotation invariance.
D'Ambrosio, Vincenzo, Carvacho, Gonzalo, Graffitti, Francesco, Vitelli, Chiara, PICCIRILLO, BRUNO, MARRUCCI, LORENZO, Sciarrino, Fabio   +6 more
openaire   +3 more sources