Bessel-Gauss beams in the generalized Lorenz-Mie theory using three remodeling techniques

Author(s)

Valdivia, Nereida L. ^[1] ; Votto, Luiz F. M. ^[1] ; Gouesbet, Gerard ^[2] ; Wang, Jiajie ^[3] ; Ambrosio, Leonardo A. ^[1]

Affiliation

^[1] Univ Sao Paulo, Dept Elect & Comp Engn, Sao Carlos Sch Engn, 400 Trabalhador Sao Carlense Ave, BR-13566590 Sao Carlos, SP - Brazil

^[2] Normandie Univ, CORIA UMR 6614, CNRS, Univ & INSA Rouen, Campus Univ Madrillet, F-76800 St Etienne Du Rouvray - France

^[3] Xidian Univ, Sch Phys & Optoelect Engn, Xian 710071, Shaanxi - Peoples R China

• Document type: Journal article
• Source: JOURNAL OF QUANTITATIVE SPECTROSCOPY & RADIATIVE TRANSFER; v. 256, NOV 2020.
• Web of Science Citations: 1

Abstract

In the analysis of light scattering by small particles, the Generalized Lorenz-Mie Theory (GLMT) describes the incident beam with a set of Beam Shape Coefficients (BSCs) that can be calculated with three different approaches, viz., quadratures, finite series and localized approximations. Choosing between them may not be self-evident. A Bessel-Gauss beam (BGB) is a finite energy, physically realizable wave field resulting from the apodization of a Bessel beam by a Gaussian function. This paper provides a comparison between the aforementioned techniques for the evaluation of the BSCs of scalar BGBs with distinct axicon angles and confinement parameters, including field reconstructions. All three methods agree quite well in the paraxial regime, although as the axicon angle or the topological charge increases, differences in the BSCs for each method become more and more evident. (C) 2020 Elsevier Ltd. All rights reserved. (AU)

• FAPESP's process: 17/10445-0 - Micro-structured non-diffracting light beams for optical micromanipulation
• Grantee: Leonardo Andre Ambrosio
• Support Opportunities: Regular Research Grants