Analysis and optimization of cylindrical vector beams focusing through all-dielectric concave grating lens with negative-index

2020 ◽  
Author(s):  
Congying Zhu ◽  
Haosi Huang ◽  
Mulin Chen ◽  
XinZe Yang ◽  
Yining Zhang ◽  
...  
Keyword(s):  
Negative Index ◽  
Vector Beams ◽  
Concave Grating

Focus modulation of cylindrical vector beams through negative-index grating lenses

2016 ◽  
Vol 372 ◽  
pp. 245-249 ◽  
Author(s):  
Shengming Wang ◽  
Ji Xu ◽  
Yi Zhong ◽  
Rong Ren ◽  
Yunqing Lu ◽  
...  
Keyword(s):  
Negative Index ◽  
Vector Beams

Steering Nonlinear Twisted Valley Photons of Monolayer WS2 by Vector Beams

Nano Letters ◽  
2021 ◽  
Author(s):  
HongWei Yang ◽  
Jintao Pan ◽  
Shuang Zhang ◽  
Wenguo Zhu ◽  
Li Zhang ◽  
...  
Keyword(s):  
Vector Beams

All-fiber cylindrical vector beams laser based on the principle of mode superposition

2021 ◽  
Vol 139 ◽  
pp. 106965
Author(s):  
Zhipeng Dong ◽  
Yimin Zhang ◽  
Hongxun Li ◽  
Runxia Tao ◽  
Chun Gu ◽  
...  
Keyword(s):  
Mode Superposition ◽  
Vector Beams

scholarly journals Generation of terahertz vector beams using dielectric metasurfaces via spin-decoupled phase control

Nanophotonics ◽  
2020 ◽  
Vol 9 (10) ◽  
pp. 3393-3402 ◽  
Author(s):  
Yuehong Xu ◽  
Huifang Zhang ◽  
Quan Li ◽  
Xueqian Zhang ◽  
Quan Xu ◽  
...  
Keyword(s):  
High Performance ◽  
Special Kind ◽  
Phase Control ◽  
High Resolution Imaging ◽  
Plasmon Excitation ◽  
Bessel Beams ◽  
Dynamic Phase ◽  
Vector Beams ◽  
Resolution Imaging ◽  
Spatially Variant

AbstractCylindrical vector beams (CVBs), being a special kind of beams with spatially variant states of polarizations, are promising in photonics applications, including high-resolution imaging, plasmon excitation, optical trapping, and laser machining. Recently, generating CVBs using metasurfaces has drawn enormous interest owing to their highly designable, multifunctional, and integratable features. However, related studies remain unexplored in the terahertz regime. Here, a generic method for efficiently generating terahertz CVBs carrying orbital angular momentums (OAMs) is proposed and experimentally demonstrated using transmission-type spatial-variant dielectric metasurfaces, which is realized by designing the interference between the two circularly polarized transmission components. This method is based on spin-decoupled phase control allowed by simultaneously manipulating the dynamic phase and geometric phase of each structure, endowing more degree of freedom in designing the vector beams. Two types of metasurfaces which respectively generate polarization-dependent terahertz vector vortex beams (VVBs) and vector Bessel beams (VBBs) are experimentally characterized. The proposed method opens a new window to generate versatile vector beams, providing new capabilities in developing novel, compact, and high-performance devices applicable to broad electromagnetic spectral regimes.

Generation of vector beams array with a single spatial light modulator

2021 ◽  
pp. 126915
Author(s):  
Lijiao Guo ◽  
Zhiqing Feng ◽  
Yating Fu ◽  
Changjun Min
Keyword(s):  
Spatial Light Modulator ◽  
Light Modulator ◽  
Vector Beams

scholarly journals Metasurface of Combined Semicircular Rings with Orthogonal Slit Pairs for Generation of Dual Vector Beams

Nanomaterials ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 1718
Author(s):  
Qian Kong ◽  
Manna Gu ◽  
Xiangyu Zeng ◽  
Rui Sun ◽  
Yuqin Zhang ◽  
...  
Keyword(s):  
Time Domain ◽  
Finite Difference Time Domain ◽  
Polarized Light ◽  
Orientation Angle ◽  
Fdtd Simulation ◽  
Dual Vector ◽  
Vector Beams ◽  
Linearly Polarized ◽  
Potential Applications ◽  
Difference Time

Manipulation of multichannel vector beams (VBs) with metasurfaces is an important topic and holds potential applications in information technology. In this paper, we propose a novel metasurface for the generation of dual VBs, which is composed of orthogonal slit pairs arranged on multiple groups of combined semicircular rings (CSRs). A group of CSRs include a right-shifted set and a left-shifted set of semicircular rings, and each set of semicircular rings has two halves of circles with different radii, sharing the same shifted center. Under the illumination of linearly polarized light, the two shifted sets of semicircular rings generate the two VBs at the shifted center positions on the observation plane. The slit units of each set are designed with independent rotation order and initial orientation angle. By adjusting the linear polarization of illumination, both two VBs with their orders and polarization states are independently controlled simultaneously. The principle and design are demonstrated by the finite-difference time domain (FDTD) simulation. The work is of significance for miniatured devices of VB generators and for related applications.

Negative index metamaterials based on metal-dielectric nanocomposites for imaging applications

2008 ◽  
Vol 93 (12) ◽  
pp. 123117 ◽  
Author(s):  
L. Menon ◽  
W. T. Lu ◽  
A. L. Friedman ◽  
S. P. Bennett ◽  
D. Heiman ◽  
...  
Keyword(s):  
Negative Index
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