Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 35, Issue 11, Pages 2690-2698Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.35.002690
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Funding
- Natural Science Foundation of Shaanxi Province [2018JM6016]
- National Natural Science Foundation of China (NSFC) [61501350]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [2014/04867-1, 2016/11174-8, 2017/10445-0]
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This paper analyzes the validity of the integral localized approximation for discrete superpositions of arbitrary order Bessel beams-known as frozen waves. It is motivated by the fact that such an approximation has been adopted in previous works under the framework of the generalized Lorenz-Mie theory for electromagnetic scattering by microparticles when illuminated by paraxial frozen waves. The results presented here give support to those previous works, but they also serve as a warning for future research in the field in the sense that the localized approximation can be of limited validity for nonparaxial laser beams when the axicon angle is not small enough, or when a net topological charge exists. (c) 2018 Optical Society of America
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