Open AccessNonlinearities in GaAs cavities with high CW input powers enabled by photo-oxidation quenching through ALD encapsulation
Author(s) -
Grégory Moille,
Sylvain Combrié,
Laurence Morgenroth,
Gaëlle Lehoucq,
S. Sauvage,
M. El Kurdi,
P. Boucaud,
Alfredo De Rossi,
X. Checoury
Publication year - 2018
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.26.006400
Subject(s) - resonator , atomic layer deposition , materials science , optoelectronics , second harmonic generation , optics , photonic crystal , nonlinear optics , photonics , encapsulation (networking) , laser , thin film , nanotechnology , physics , computer network , computer science
We demonstrate that conformal encapsulation using atomic layer deposition of GaAs nano-cavity resonator made of photonic crystal cavity prevents photo-induced oxidation. This improvement allows injecting a large quantity of energy in the resonator without any degradation of the material, thus enabling spectral stability of the resonance. We prove second harmonic and third harmonic generation over more than one decade of pump power variation, thanks to this encapsulation, with a total efficiency (ηSHG = 8.3 × 10 -5 W -1 and ηTHG = 1.2 × 10 -3 W -2 ) and a large net output energy for both operations (PSHGout=0.2nW and PTHGout=8pW).