Chinese Optics Letters, 2017, 15 (3): 030003, Published Online: Jul. 25, 2018
Linear and angular momenta in tightly focused vortex segmented beams of light (Invited Paper) Download: 1076次
Abstract
We investigate the linear momentum density of light, which can be decomposed into spin and orbital parts, in the complex three-dimensional field distributions of tightly focused vortex segmented beams. The chosen angular spectrum exhibits two spatially separated vortices of opposite charge and orthogonal circular polarization to generate phase vortices in a meridional plane of observation. In the vicinity of those vortices, regions of negative orbital linear momentum occur. Besides these phase vortices, the occurrence of transverse orbital angular momentum manifests in a vortex charge-dependent relative shift of the energy density and linear momentum density.
Martin Neugebauer, Andrea Aiello, Peter Banzer. Linear and angular momenta in tightly focused vortex segmented beams of light (Invited Paper)[J]. Chinese Optics Letters, 2017, 15(3): 030003.