Spin to orbital angular momentum transfer in frequency up-conversion

Braian Pinheiro da Silva, Wagner T. Buono, Leonardo J. Pereira, Daniel S. Tasca, Kaled Dechoum, Antonio Z. Khoury

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)
1 Downloads (Pure)

Abstract

We demonstrate the spin to orbital angular momentum transfer in frequency upconversion with structured light beams. A vector vortex is coupled to a circularly polarized Gaussian beam in noncollinear second harmonic generation under type-II phase match. The second harmonic beam inherits the Hermite–Gaussian components of the vector vortex; however, the relative phase between them is determined by the polarization state of the Gaussian beam. This effect creates an interesting crosstalk between spin and orbital degrees of freedom, allowing the angular momentum transfer between them. Our experimental results match the theoretical predictions for the nonlinear optical response.
Original languageEnglish
Pages (from-to)771-778
Number of pages8
JournalNanophotonics
Volume11
Issue number4
Early online date8 Nov 2021
DOIs
Publication statusPublished - Jan 2022

Keywords

  • Nonlinear optics
  • OAM
  • second harmonic generation
  • structured light

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