Experimental realization of a resource-saving polarization-independent orbital-angular-momentum-preserving tunable beam splitter

2019 ◽  
Vol 44 (4) ◽  
pp. 755
Author(s):  
Ya-Ping Li ◽  
Fang-Xiang Wang ◽  
Wei Chen ◽  
Guo-Wei Zhang ◽  
Zhen-Qiang Yin ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Beam Splitter ◽  
Resource Saving ◽  
Experimental Realization ◽  
Polarization Independent

Transmissive 2-bit anisotropic coding metasurface

2022 ◽  
Author(s):  
Pengtao Lai ◽  
Zenglin Li ◽  
Wei Wang ◽  
Jia Qu ◽  
Liang Wei Wu ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Electromagnetic Wave ◽  
Circular Polarization ◽  
Orbital Angular Momentum ◽  
Electromagnetic Waves ◽  
Beam Splitter ◽  
Far Field ◽  
Polarization Conversion ◽  
Field Patterns ◽  
Phase Profile

Abstract Coding metasurfaces have attracted tremendous interests due to unique capabilities of manipulating electromagnetic wave. However, archiving transmissive coding metasurface is still challenging. Here we propose a transmissive anisotropic coding metasurface that enables the independent control of two orthogonal polarizations. The polarization beam splitter and the OAM generator have been studied as typical applications of anisotropic 2-bit coding metasurface. The simulated far field patterns illustrate that the x and y polarized electromagnetic waves are deflected into two different directions, respectively. The anisotropic coding metasurface has been experimentally verified to realize an orbital angular momentum (OAM) beam with l = 2 of right-handed polarized wave, resulting from both contributions from linear-to-circular polarization conversion and the phase profile modulation. This work is beneficial to enrich the polarization manipulation field and develop transmissive coding metasurfaces.

A Compound Phase-Modulated Beam Splitter to Distinguish Both Spin and Orbital Angular Momentum

ACS Photonics ◽  
2019 ◽  
Vol 7 (1) ◽  
pp. 212-220 ◽  
Author(s):  
Xuesi Zhao ◽  
Xue Feng ◽  
Fang Liu ◽  
Kaiyu Cui ◽  
Wei Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Beam Splitter

scholarly journals Experimental realization of a 2 × 2 polarization-independent split-ratio-tunable optical beam splitter

2016 ◽  
Vol 24 (25) ◽  
pp. 28519 ◽  
Author(s):  
Ran Yang ◽  
Jian Li ◽  
Xiao-Bo Song ◽  
Ting Gao ◽  
Yi-Ran Li ◽  
...  
Keyword(s):  
Beam Splitter ◽  
Optical Beam ◽  
Experimental Realization ◽  
Split Ratio ◽  
Polarization Independent

Polarization-independent orbital angular momentum generator based on a chiral fiber grating

2018 ◽  
Vol 44 (1) ◽  
pp. 61 ◽  
Author(s):  
Yan Zhang ◽  
Zhiyong Bai ◽  
Cailing Fu ◽  
Shen Liu ◽  
Jian Tang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Fiber Grating ◽  
Polarization Independent

scholarly journals Normal modes and mode transformation of pure electron vortex beams

2017 ◽  
Vol 375 (2087) ◽  
pp. 20150438 ◽  
Author(s):  
G. Thirunavukkarasu ◽  
M. Mousley ◽  
M. Babiker ◽  
J. Yuan
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Normal Modes ◽  
Basis Set ◽  
Mode Analysis ◽  
Experimental Realization ◽  
Mode Transformation ◽  
Vortex Beams ◽  
Radial Index ◽  
The Fourier Transform

Electron vortex beams constitute the first class of matter vortex beams which are currently routinely produced in the laboratory. Here, we briefly review the progress of this nascent field and put forward a natural quantum basis set which we show is suitable for the description of electron vortex beams. The normal modes are truncated Bessel beams (TBBs) defined in the aperture plane or the Fourier transform of the transverse structure of the TBBs (FT-TBBs) in the focal plane of a lens with the said aperture. As these modes are eigenfunctions of the axial orbital angular momentum operator, they can provide a complete description of the two-dimensional transverse distribution of the wave function of any electron vortex beam in such a system, in analogy with the prominent role Laguerre–Gaussian (LG) beams played in the description of optical vortex beams. The characteristics of the normal modes of TBBs and FT-TBBs are described, including the quantized orbital angular momentum (in terms of the winding number l ) and the radial index p >0. We present the experimental realization of such beams using computer-generated holograms. The mode analysis can be carried out using astigmatic transformation optics, demonstrating close analogy with the astigmatic mode transformation between LG and Hermite–Gaussian beams. This article is part of the themed issue ‘Optical orbital angular momentum’.

scholarly journals Efficient all-optical router and beam splitter for light with orbital angular momentum

2020 ◽  
Vol 28 (13) ◽  
pp. 19750
Author(s):  
T. H. Qiu ◽  
H. Li ◽  
M. Xie ◽  
Q. Liu ◽  
H. Y. Ma ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Beam Splitter ◽  
Optical Router ◽  
All Optical
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