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- Title
Cascaded Third-Harmonic Generation in Optically Induced 3D Nonlinear Photonic Crystals.
- Authors
Xu, Tianxiang; Wang, Sen; Zeng, Jing; Liu, Dawei; Zhao, Ruwei; Yao, Yuming; Zhao, Yuhao; Zhao, Hui; Xu, Tiefeng; Sheng, Yan
- Abstract
Nonlinear photonic crystals with 3D orthorhombic lattice structures were fabricated using the femtosecond laser-poling technique in ferroelectric Sr0.28Ba0.72Nb2O6 (SBN) crystals. The crystals were used to demonstrate the possibility of generating cascaded third-harmonic waves in optically poled ferroelectric structures. The spectral response and conversion efficiency of the third-harmonic process were experimentally investigated. While the nonlinear cascading processes can be commonly realized in electric-field-poled ferroelectric crystals, their generation in optically poled ferroelectric domain structures have not been reported elsewhere. In addition to the fully phase-matched nonlinear interaction, Cherenkov-type third-harmonic generation that fulfills the longitudinal phase-matching condition was also experimentally studied. Our study contributes to exploring the full potential of optically induced nonlinear photonic crystals and provides a new choice of materials for third-harmonic generation.
- Subjects
THIRD harmonic generation; PHOTONIC crystals; FERROELECTRIC crystals; SPECTRAL sensitivity; PHOTONIC crystal fibers; FERROELECTRIC polymers; FEMTOSECOND lasers
- Publication
Photonics, 2024, Vol 11, Issue 4, p313
- ISSN
2304-6732
- Publication type
Article
- DOI
10.3390/photonics11040313