Angular spectrum representation of the Bessel-Gauss beam and its approximation: A comparison with the localized approximation

被引：28
作者：
Shen, Jianqi [1 ]
Wang, Ying [1 ]
Yu, Haitao [1 ]
Ambrosio, Leonardo Andre [2 ]
Gouesbet, Gerard [3 ]
机构：
[1] Univ Shanghai Sci & Technol, Coll Sci, 516 Jungong Rd, Shanghai 200093, Peoples R China
[2] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Elect & Comp Engn, 400 Trabalhador Sao Carlense Ave, BR-13566590 Sao Carlos, SP, Brazil
[3] Univ & INSA Rouen, Normandie Univ, CORIA,CNRS, UMR 6614, Campus Univ Madrillet, F-76800 St Etienne Rouvray, France
来源：
JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER | 2022年 / 284卷
关键词：
Angular spectrum representation; Localized approximation; Beam shape coefficient; Bessel-Gauss beam; LORENZ-MIE THEORY; ARBITRARY SHAPED BEAMS; RIGOROUS JUSTIFICATION; LIGHT-SCATTERING; VALIDITY; COEFFICIENTS; ORDER; DIFFRACTION; GENERATION; PROPAGATION;
D O I：
10.1016/j.jqsrt.2022.108167
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The angular spectrum representation of the vector Bessel-Gauss beam is used for discussing the connection between the angular spectrum decomposition (ASD) method and the quadrature method of the generalized Lorenz-Mie theory (GLMT). Under the paraxial condition, the beam shape coefficients (BSCs) obtained in the ASD method can be approximated to the same expressions as those obtained in the localized approximation method. The validity of the approximate method for evaluating the BSCs is numerically studied, based on both the beam's angular spectrum and the off-axis distance. (c) 2022 Elsevier Ltd. All rights reserved.
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页数：17
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