Efficient continuous-wave nonlinear frequency conversion in high-Q gallium nitride photonic crystal cavities on silicon

We report on nonlinear frequency conversion from the telecom range via second harmonic generation (SHG) and third harmonic generation (THG) in suspended gallium nitride slab photonic crystal (PhC) cavities on silicon, under continuous-wave resonant excitation. Optimized two-dimensional PhC cavities with augmented far-field coupling have been characterized with quality factors as high as 4.4 x 10(4), approaching the computed theoretical values. The strong enhancement in light confinement has enabled efficient SHG, achieving a normalized conversion efficiency of 2.4 x 10(-3) W-1, as well as simultaneous THG. SHG emission power of up to 0.74 nW has been detected without saturation. The results herein validate the suitability of gallium nitride for integrated nonlinear optical processing. (C) 2017 Author(s).


Publié dans:
APL Photonics, 2, 3, 031301
Année
2017
Publisher:
Melville, Amer Inst Physics
Mots-clefs:
Laboratoires:


Note: Le statut de ce fichier est: Seulement EPFL


 Notice créée le 2017-05-01, modifiée le 2019-06-17

Publisher's version:
Télécharger le documentPDF
Lien externe:
Télécharger le documentURL
Évaluer ce document:

Rate this document:
1
2
3
 
(Pas encore évalué)