Abstract：
:We introduce a simple method to characterize the topological charge associated with the orbital angular momentum of a m-order elliptic light beam. This method consists in the observation of the far field pattern of the beam carrying orbital angular momentum, diffracted from a triangular aperture. We show numerically and experimentally, for Mathieu, Ince-Gaussian, and vortex Hermite-Gaussian beams, that only isosceles triangular apertures allow us to determine in a precise and direct way, the magnitude m of the order and the number and sign of unitary topological charges of isolated vortices inside the core of these beams.
journal_name
Sci Repjournal_title
Scientific reportsauthors
Melo LA,Jesus-Silva AJ,Chávez-Cerda S,Ribeiro PHS,Soares WCdoi
10.1038/s41598-018-24928-5subject
Has Abstractpub_date
2018-04-23 00:00:00pages
6370issue
1issn
2045-2322pii
10.1038/s41598-018-24928-5journal_volume
8pub_type
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