Talbot effect in optical lattices with topological charge

We studied the interference resulting from the superposition of optical lattices, which are non-diffracting fields propagating in free space, and showed a Talbot self-imaging effect. These lattices are formed by spatially Fourier transforming a "quasi"-orbital angular momentum (OAM) state....

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Bibliographic Details
Published in:Optics letters 2017-10, Vol.42 (19), p.3944-3947
Main Authors: Rodrigues, José S, Mendes, Caio V C, Fonseca, Eduardo J S, Jesus-Silva, Alcenísio J
Format: Article
Language:English
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Summary:We studied the interference resulting from the superposition of optical lattices, which are non-diffracting fields propagating in free space, and showed a Talbot self-imaging effect. These lattices are formed by spatially Fourier transforming a "quasi"-orbital angular momentum (OAM) state. We experimentally observed that although the Talbot images change, the Talbot length is insensitive to the topological charge of the "quasi"-OAM state. Our findings can be useful for laser-written photonic lattices.
ISSN:0146-9592
1539-4794
DOI:10.1364/OL.42.003944