Journal
QUANTUM SCIENCE AND TECHNOLOGY
Volume 6, Issue 2, Pages -Publisher
IOP Publishing Ltd
DOI: 10.1088/2058-9565/abe8ca
Keywords
quantum resolution limits; quantum Fisher information; orbital angular momentum
Funding
- project ApresSF, under the QuantERA programme from the European Union's Horizon 2020 research and innovation programme
- program H2020 (project StormyTune), Grant Agency of the Czech Republic [18-04291S]
- Palacky University [IGA_PrF_2020_004]
- Spanish Ministerio de Ciencia e Innovacion [PGC2018-099183-B-I00]
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Improving axial resolution is crucial for three-dimensional optical imaging systems, and using vortex beams can achieve ultimate precision in axial localization. While this limit can be reached with just an intensity scan for Laguerre-Gauss beams, it is not the case for superpositions of such beams. Microscopy methods based on rotating vortex beams may benefit from advanced mode-sorting techniques replacing traditional intensity sensors.
Improving axial resolution is paramount importance for three-dimensional optical imaging systems. Here, we investigate the ultimate precision in axial localization using vortex beams. For Laguerre-Gauss (LG) beams, this limit can be achieved with just an intensity scan. The same is not true for superpositions of LG beams, in particular for those with intensity profiles that rotate on defocusing. Microscopy methods based on rotating vortex beams may thus benefit from replacing traditional intensity sensors with advanced mode-sorting techniques.
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