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  Ultrafast spinning twisted ribbons of confined electric fields

Bauer, T., Khonina, S. N., Golub, I., Leuchs, G., & Banzer, P. (2020). Ultrafast spinning twisted ribbons of confined electric fields. Optica, 7(10), 1228-1231. doi:10.1364/OPTICA.392772.

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© 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement

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 Creators:
Bauer, Thomas1, Author
Khonina, Svetlana N.2, 3, Author
Golub, Ilya4, Author
Leuchs, Gerd5, 6, Author           
Banzer, Peter6, 7, Author           
Affiliations:
1Kavli Institute of Nanoscience Delft, Delft University of Technology, Lorentzweg 1, Delft 2628 CJ, The Netherlands, ou_persistent22              
2IPSI RAS–Branch of the FSRC “Crystallography and Photonics” RAS, 151 Molodogvardeiskaya Str., Samara 443001, Russia, ou_persistent22              
3Samara National Research University, 34 Moskovskoye Shosse, Samara 443086, Russia, ou_persistent22              
4School of Advanced Technology, Algonquin College, Ottawa, Ontario K2G 1V8, Canada, ou_persistent22              
5Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, ou_3164407              
6Institute of Optics, Information and Photonics, Friedrich-Alexander University Erlangen-Nürnberg, Staudtstr. 7/B2, D-91058 Erlangen, ou_persistent22              
7Interference Microscopy and Nanooptics, Emeritus Group Leuchs, Emeritus Groups, Max Planck Institute for the Science of Light, Max Planck Society, ou_2364700              

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Free keywords: Topological properties, Ultrafast spinning, twisted ribbons
 Abstract: Topological properties of light attract tremendous attention in the optics communities and beyond. For instance, light beams gain robustness against certain deformations when carrying topological features, enabling intriguing applications. We report on the observation of a topological structure contained in an optical beam, i.e., a twisted ribbon formed by the electric field vector per se, in stark contrast to recently reported studies dealing with topological structures based on the distribution of the time averaged polarization ellipse. Moreover, our ribbons are spinning in time at a frequency given by the optical frequency divided by the total angular momentum of the incoming beam. The number of full twists of the ribbon is equal to the orbital angular momentum of the longitudinal component of the employed light beam upon tight focusing, which is a direct consequence of spin-to-orbit coupling. We study this angular-momentum-transfer-assisted generation of the twisted ribbon structures theoretically and experimentally for tightly focused circularly polarized beams of different vorticity, paving the way to tailored topologically robust excitations of novel coherent light–matter states.

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Language(s): eng - English
 Dates: 2020-09-21
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: -
 Identifiers: DOI: 10.1364/OPTICA.392772
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Title: Optica
Source Genre: Journal
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Publ. Info: Optical Society of America
Pages: - Volume / Issue: 7 (10) Sequence Number: - Start / End Page: 1228 - 1231 Identifier: ISSN: 2334-2536