Controlling second-harmonic generation at the nanoscale with monolithic AlGaAs-on-AlOx antennas. (16th February 2017)

• Record Type: Journal Article
• Authors: Carletti, L; Rocco, D; Locatelli, A; De Angelis, C; Gili, V F; Ravaro, M; Favero, I; Leo, G; Finazzi, M; Ghirardini, L; Celebrano, M; Marino, G; Zayats, A V
• Is Part Of: Nanotechnology. Volume 28:Number 11(2017)
• Publication Date: 2017-02-16
• Subjects: optical antennas -- metamaterials -- second harmonic generation; Nanotechnology -- Periodicals; Nanotechnology -- Periodicals; Nanotechnology; Publications périodiques; Nanotechnologies; Periodicals; 620.5
• DOI: 10.1088/1361-6528/aa5645
• Languages: English
• ISSNs: 0957-4484

Abstract

Abstract: We review recent achievements in the field of nanoscale nonlinear AlGaAs photonics based on all-dielectric optical antennas. After discussing the motivation and main technological challenges for the development of an AlGaAs monolithic platform for χ (2) nonlinear nanophotonics, we present numerical and experimental investigations of the second-order nonlinear response and physical reasons for high efficiency of second-order nonlinear interactions in the AlGaAs nano-antennas. In particular, we emphasize the role of the dipolar resonances at the fundamental frequency and the multipolar resonances at the second harmonic wavelength. We also discuss second-harmonic generation directionality and show possible strategies to engineer the radiation pattern of nonlinear antennas.