Azimuthal and radial shaping of vortex beams generated in twisted nonlinear photonic crystals

Keren Shemer, Noa Voloch-Bloch, Asia Shapira, Ana Libster, Irit Juwiler, Ady Arie

Research output: Contribution to journalArticlepeer-review

23 Scopus citations

Abstract

We experimentally demonstrate that the orbital angular momentum (OAM) of a second harmonic (SH) beam, generated within twisted nonlinear photonic crystals, depends both on the OAM of the input pump beam and on the quasi-angular momentum of the crystal. In addition, when the pump's radial index is zero, the radial index of the SH beam is equal to that of the nonlinear crystal. Furthermore, by mixing two noncollinear pump beams in this crystal, we generate, in addition to the SH beams, a new "virtual beam" having multiple values of OAM that are determined by the nonlinear process.

Original languageEnglish
Pages (from-to)5470-5473
Number of pages4
JournalOptics Letters
Volume38
Issue number24
DOIs
StatePublished - 15 Dec 2013
Externally publishedYes

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