Open AccessScattering of a beam with orbital angular momentum by a single sphere
Author(s) -
Linda Hong,
Xizheng Ke
Publication year - 2009
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.58.8302
Subject(s) - physics , scattering , m squared , beam diameter , beam (structure) , angular momentum , gaussian beam , optics , laser beam quality , radius , computational physics , classical mechanics , laser , computer security , laser beams , computer science
The propagation properties and scattering characteristic of a beam with orbital angular momentum transmission were researched by using the generalized Lorenz-Mie theory. Based on the research on the scattering of the Gaussian beam from single spherethe intensity distributions of LGB beam at different propagation distance is analyzed. Without considering the relation between scattering and phase shiftthe beam coefficients is obtained by the solution of scattering cross sectionand the LGB is expanded in terms of the vector spherical harmonics as fundamental Gaussian beam. The scattering of the beam with orbital angular momentum from single sphere located on the propagation axis is studied. The influence of scattering intensity and angular distribution on scattering characteristic for different beam width is discussed by numerical simulationand compared with those for the plane wave. The results show that when the beam waist radius is very smallthe beam waist radius has serious influence on the decay rate. When the beam waist radius is relatively largethe influence is similar to that of plane wave.