Measuring the complex spectrum of orbital angular momentum and radial index with a single-pixel detector

2020 ◽  
Vol 45 (21) ◽  
pp. 5990
Author(s):  
Shupeng Zhao ◽  
Shouqian Chen ◽  
Xiao Wang ◽  
Ruifeng Liu ◽  
Pei Zhang ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Complex Spectrum ◽  
Pixel Detector ◽  
Radial Index ◽  
Single Pixel

scholarly journals Orbital angular momentum complex spectrum analyzer for vortex light based on the rotational Doppler effect

2016 ◽  
Vol 6 (4) ◽  
pp. e16251-e16251 ◽  
Author(s):  
Hai-Long Zhou ◽  
Dong-Zhi Fu ◽  
Jian-Ji Dong ◽  
Pei Zhang ◽  
Dong-Xu Chen ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Doppler Effect ◽  
Spectrum Analyzer ◽  
Complex Spectrum ◽  
Momentum Complex

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’.

Advanced Mode Unity Using Loop Antennas Proximate to Reflector for Orbital Angular Momentum Communication

2018 ◽  
Author(s):  
Ryohei Yamagishi ◽  
Hiroto Otsuka ◽  
Ryo Ishikawa ◽  
Akira Saitou ◽  
Hiroshi Suzuki ◽  
...  
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Loop Antennas
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