Investigation of Bessel beam propagation in scattering media with scalar diffraction method

2013 ◽  
Vol 11 (11) ◽  
pp. 112601-112605 ◽  
Author(s):  
Juanjuan Zheng Juanjuan Zheng ◽  
Baoli Yao Baoli Yao ◽  
Yanlong Yang Yanlong Yang ◽  
Ming Lei Ming Lei ◽  
Peng Gao Peng Gao ◽  
...  
Keyword(s):  
Bessel Beam ◽  
Diffraction Method ◽  
Beam Propagation ◽  
Scattering Media ◽  
Scalar Diffraction

scholarly journals “Perfect” Terahertz Vortex Beams Formed Using Diffractive Axicons and Prospects for Excitation of Vortex Surface Plasmon Polaritons

2021 ◽  
Vol 11 (2) ◽  
pp. 717
Author(s):  
Boris Knyazev ◽  
Valery Cherkassky ◽  
Oleg Kameshkov
Keyword(s):  
Surface Plasmon ◽  
Surface Plasmon Polaritons ◽  
Bessel Beam ◽  
Diffraction Theory ◽  
Terahertz Range ◽  
High Resistivity ◽  
Visible Range ◽  
Optical Elements ◽  
Scalar Diffraction ◽  
Plasmon Polaritons

Transformation of a Bessel beam by a lens results in the formation of a “perfect” vortex beam (PVB) in the focal plane of the lens. The PVB has a single-ring cross-section and carries an orbital angular momentum (OAM) equal to the OAM of the “parent” beam. PVBs have numerous applications based on the assumption of their ideal ring-type structure. For instance, we proposed using terahertz PVBs to excite vortex surface plasmon polaritons propagating along cylindrical conductors and the creation of plasmon multiplex communication lines in the future (Comput. Opt. 2019, 43, 992). Recently, we demonstrated the formation of PVBs in the terahertz range using a Bessel beam produced using a spiral binary silicon axicon (Phys. Rev. A 2017, 96, 023846). It was shown that, in that case, the PVB was not annular, but was split into nested spiral segments, which was obviously a consequence of the method of Bessel beam generation. The search for methods of producing perfect beams with characteristics approaching theoretically possible ones is a topical task. Since for the terahertz range, there are no devices like spatial modulators of light in the visible range, the main method for controlling the mode composition of beams is the use of diffractive optical elements. In this work, we investigated the characteristics of perfect beams, the parent beams being quasi-Bessel beams created by three types of diffractive phase axicons made of high-resistivity silicon: binary, kinoform, and “holographic”. The amplitude-phase distributions of the field in real perfect beams were calculated numerically in the approximation of the scalar diffraction theory. An analytical expression was obtained for the case of the binary axicon. It was shown that a distribution closest to an ideal vortex was obtained using a holographic axicon. The resulting distributions were compared with experimental and theoretical distributions of the evanescent field of a plasmon near the gold–zinc sulfide–air surface at different thicknesses of the dielectric layer, and recommendations for experiments were given.

Superimposed orbital angular momentum mode of multiple Hankel–Bessel beam propagation in anisotropic non-Kolmogorov turbulence

2016 ◽  
Vol 14 (8) ◽  
pp. 080102-80107 ◽  
Author(s):  
Guanghui Wu Guanghui Wu ◽  
Chuangming Tong Chuangming Tong ◽  
Mingjian Cheng Mingjian Cheng ◽  
and Peng Peng and Peng Peng
Keyword(s):  
Angular Momentum ◽  
Orbital Angular Momentum ◽  
Bessel Beam ◽  
Beam Propagation ◽  
Kolmogorov Turbulence ◽  
Momentum Mode

Fluorescence volume imaging with an axicon: simulation study based on scalar diffraction method

2012 ◽  
Vol 51 (30) ◽  
pp. 7236 ◽  
Author(s):  
Juanjuan Zheng ◽  
Yanlong Yang ◽  
Ming Lei ◽  
Baoli Yao ◽  
Peng Gao ◽  
...  
Keyword(s):  
Simulation Study ◽  
Diffraction Method ◽  
Scalar Diffraction ◽  
Volume Imaging ◽  
Fluorescence Volume

Numerical Simulation of In-Line Gratings for Differential Push-Pull Signals Using the Scalar Diffraction Method

2014 ◽  
Vol 50 (7) ◽  
pp. 1-4 ◽  
Author(s):  
Li-Kang Cheng ◽  
Hsi-Fu Shih ◽  
Yi Chiu ◽  
Jenq-Shyong Chen ◽  
Smart Yang ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Diffraction Method ◽  
Scalar Diffraction

scholarly journals Development of a beam propagation method to simulate the point spread function degradation in scattering media

2019 ◽  
Vol 44 (20) ◽  
pp. 4989 ◽  
Author(s):  
Xiaojun Cheng ◽  
Yunzhe Li ◽  
Jerome Mertz ◽  
Sava Sakadžić ◽  
Anna Devor ◽  
...  
Keyword(s):  
Point Spread Function ◽  
Beam Propagation Method ◽  
Beam Propagation ◽  
Scattering Media ◽  
Point Spread ◽  
Spread Function
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