Cascaded Third-Harmonic Generation in Optically Induced 3D Nonlinear Photonic Crystals

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 fer...

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Bibliographic Details
Published inPhotonics Vol. 11; no. 4; p. 313
Main Authors Xu, Tianxiang, Wang, Sen, Zeng, Jing, Liu, Dawei, Zhao, Ruwei, Yao, Yuming, Zhao, Yuhao, Zhao, Hui, Xu, Tiefeng, Sheng, Yan
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.04.2024
Subjects
3D nonlinear photonic crystal
Crystal lattices
Crystals
Efficiency
Electric fields
femtosecond laser poling
Ferroelectric crystals
Ferroelectric domains
Ferroelectric materials
Ferroelectricity
Harmonic generations
Lasers
Optics
Orthorhombic lattice
Phase matching
Photonic crystals
quasi-phase matching
Spectral sensitivity
third-harmonic generation
Yen, Sheng
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Summary: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.
ISSN:2304-6732
2304-6732
DOI:10.3390/photonics11040313