Directionally induced quasi-phase matching in homogeneous AlGaAs waveguides
Authors: Morais N., Roland I., Ravaro M., Hease W., Lemaître A., Gomez C., Wabnitz S., De Rosa M., Favero I., Leo G.
Autors Affiliation: Matériaux et Phénomènes Quantiques, Université Paris Diderot, CNRS, 10 rue Domon et Duquet,75013 Paris, France; Centre de Nanosciences et de Nanotechnologies, CNRS, Univ. Paris-Sud, Université Paris-Saclay 91460, Marcoussis, France; Department of Information Engineering, University of Brescia, Via Branze 38, 25123 Brescia, Italy; CNR-INO, Istituto Nazionale di Ottica, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
Abstract: We report on the experimental observation of quasi-phase matching in a homogeneous waveguide. By fabricating a monolithic snake-shaped suspended AlGaAs nanowire on a (001) GaAs wafer, we demonstrate the unraveled version of a chi((2)) whispering-gallery-mode microdisk, obtaining second-harmonic generation in the optical telecom wavelength range. With a radius of curvature of 50 mu m and four spatial oscillations along the (110) average direction, a splitting of the second-harmonic spectrum occurs around the phase-matching wavelength of the corresponding straight waveguide. This splitting, which increases as the radius of curvature decreases, provides a useful degree of freedom for the design of small-footprint nonlinear photonic devices on-chip. (C) 2017 Optical Society of America
Journal/Review: OPTICS LETTERS
Volume: 42 (21) Pages from: 4287 to: 4290
More Information: Consiglio Nazionale delle Ricerche (CNR) (Short Term Mobility Program 2016); SATT IdF-Innov; Ministero dellDOI: 10.1364/OL.42.004287Citations: 7data from “WEB OF SCIENCE” (of Thomson Reuters) are update at: 2019-08-18References taken from IsiWeb of Knowledge: (subscribers only)Connecting to view paper tab on IsiWeb: Click hereConnecting to view citations from IsiWeb: Click here