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Journal Article

Linear and angular momenta in tightly focused vortex segmented beams of light

MPS-Authors
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Neugebauer,  Martin
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Aiello,  Andrea
Marquardt Division, Max Planck Institute for the Science of Light, Max Planck Society;

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Banzer,  Peter
Interference Microscopy and Nanooptics, Leuchs Division, Max Planck Institute for the Science of Light, Max Planck Society;

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COL201715030003.pdf
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Neugebauer, M., Aiello, A., & Banzer, P. (2017). Linear and angular momenta in tightly focused vortex segmented beams of light. Chinese Optics Letters, 15(3): 030003. doi:10.3788/COL201715.030003.


Cite as: https://hdl.handle.net/21.11116/0000-0000-7E30-D
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.