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Structured caustic vector vortex optical field: manipulating optical angular momentum flux and polarization rotation
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2015 (Engelska)Ingår i: Scientific Reports, ISSN 2045-2322, E-ISSN 2045-2322, Vol. 5, artikel-id 10628Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

A caustic vector vortex optical field is experimentally generated and demonstrated by a caustic-based approach. The desired caustic with arbitrary acceleration trajectories, as well as the structured states of polarization (SoP) and vortex orders located in different positions in the field cross-section, is generated by imposing the corresponding spatial phase function in a vector vortex optical field. Our study reveals that different spin and orbital angular momentum flux distributions (including opposite directions) in different positions in the cross-section of a caustic vector vortex optical field can be dynamically managed during propagation by intentionally choosing the initial polarization and vortex topological charges, as a result of the modulation of the caustic phase. We find that the SoP in the field cross-section rotates during propagation due to the existence of the vortex. The unique structured feature of the caustic vector vortex optical field opens the possibility of multi-manipulation of optical angular momentum fluxes and SoP, leading to more complex manipulation of the optical field scenarios. Thus this approach further expands the functionality of an optical system.

Ort, förlag, år, upplaga, sidor
2015. Vol. 5, artikel-id 10628
Nyckelord [en]
Beams, Generation, Light, Phase, Pattern, Modes, Gauss, Laser
Nationell ämneskategori
Annan teknik
Identifikatorer
URN: urn:nbn:se:kth:diva-169961DOI: 10.1038/srep10628ISI: 000355590800006PubMedID: 26024434Scopus ID: 2-s2.0-84930626554OAI: oai:DiVA.org:kth-169961DiVA, id: diva2:826550
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QC 20150625

Tillgänglig från: 2015-06-25 Skapad: 2015-06-25 Senast uppdaterad: 2017-12-04Bibliografiskt granskad

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He, Sailing
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Elektroteknisk teori och konstruktionZhejiang-KTH Joint Research Center of Photonics, JORCEP
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