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Theoretical prediction of three-dimensional shifting of a spherical focal spot in a 4Pi focusing system

Autor(en)
Ze Li, Shaohui Yan, B Yao, Ming Lei, Baiheng Ma, Peng Gao, Dan Dan, Romano Rupp
Abstrakt

A spherical focal spot can be generated by focusing radially polarized laser beams in a 4Pi focusing system, which will result in an increase in axial resolution in microscopy or higher axial trapping efficiency. We demonstrate the possibility of continuous shifting of the spherical focal spot along the prescribed trajectory in three-dimensional space by suitably modulating the phase of the input fields at the pupil planes of the microscope objective lenses. This may provide an alternative to moving trapped particles or scanning a specimen without moving either laser beams or the stage

Organisation(en)
Physik Funktioneller Materialien
Externe Organisation(en)
Chinese Academy of Sciences (CAS), University of the Chinese Academy of Sciences
Journal
Journal of Optics A: Pure and Applied Optics (Print Edition)
Band
14
Anzahl der Seiten
5
ISSN
1464-4258
DOI
https://doi.org/10.1088/2040-8978/14/5/055706
Publikationsdatum
2012
Peer-reviewed
Ja
ÖFOS 2012
103018 Materialphysik
Link zum Portal
https://ucrisportal.univie.ac.at/de/publications/611c1771-e709-4702-a920-464e1ef195c7