Article Dans Une Revue Journal of Quantitative Spectroscopy and Radiative Transfer Année : 2024

Eliminating blowing-ups and evanescent waves when using the finite series technique in evaluating beam shape coefficients for some T-matrix approaches, with the example of Gaussian beams

Résumé

When evaluating beam shape coefficients which encode the description of laser beams, for use in some T-matrix approaches such as generalized Lorenz-Mie theory or Extended Boundary Condition Method for structured beams, by using finite series, blowing-ups are observed. When numerical inaccuracies are ruled out, it has been firmly demonstrated that such blowing-ups correspond to genuine physical phenomena, namely they describe evanescent waves. We propose a method to eliminate these blowing-ups and the corresponding evanescent waves (at least most of them).

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hal-04829046 , version 1 (23-01-2026)

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Gérard Gouesbet, Jianqi Shen, Leonardo André Ambrosio. Eliminating blowing-ups and evanescent waves when using the finite series technique in evaluating beam shape coefficients for some T-matrix approaches, with the example of Gaussian beams. Journal of Quantitative Spectroscopy and Radiative Transfer, 2024, 330, pp.109212. ⟨10.1016/j.jqsrt.2024.109212⟩. ⟨hal-04829046⟩
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