AI Article Synopsis
- - We explored how spin and orbital angular momentum can interact during a process called frequency upconversion, using special light beams known as structured light beams.
- - In our experiment, we combined a unique vector vortex beam with a circularly polarized Gaussian beam, resulting in a second harmonic beam that retains features from the vector vortex.
- - We observed a crosstalk effect where the polarization of the Gaussian beam influences the relative phases of the components, allowing for a transfer of angular momentum, and our findings closely align with theoretical predictions.
Article 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.
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Source |
|---|---|
| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC11502115 | PMC |
| http://dx.doi.org/10.1515/nanoph-2021-0493 | DOI Listing |
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