1. Smart optically induced nonlinear photonic crystals for frequency conversion and control.
- Author
-
Liu, Dawei, Liu, Shan, Mazur, Leszek Mateusz, Wang, Bingxia, Lu, Peixiang, Krolikowski, Wieslaw, and Sheng, Yan
- Subjects
SECOND harmonic generation ,PHOTONIC crystals ,VORTEX generators ,OPTICAL vortices ,SMART materials - Abstract
We extend the functionality of nonlinear photonic crystals by fabricating a structure combining a few individual optical transformations in second harmonic generation. In particular, we employed all-optical spontaneous polarization reversal in ferroelectrics to create nonlinear holograms with curved fork-like spatial modulation of nonlinearity for the generation of second harmonic optical vortices. The curved fork-like structure represents a combination of a standard vortex harmonic generator (fork structure) and an axicon, thereby allowing us to realize the second harmonic "perfect vortices" whose diameter remains constant independently of their topological charge. [ABSTRACT FROM AUTHOR]
- Published
- 2020
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