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Highly-Efficient Longitudinal Second-Harmonic Generation from Doubly-Resonant AlGaAs Nanoantennas

By Lei Xu, Mohsen Rahmani, Daria Smirnova, Khosro Zangeneh Kamali, Guoquan Zhang, Dragomir Neshev and Andrey E. Miroshnichenko


We design an asymmetric nonlinear optical nanoantenna composed of a dielectric nanodisc and an adjacent nanobar. The proposed composite structure made of AlGaAs exhibits resonant response at both the fundamental and doubled frequencies. Being driven by the strong magnetic dipole resonance at the pump wavelength and a high-quality mode at the harmonic wavelength, the efficient second-harmonic radiation is generated predominantly along the vertical directions under the normally incident plane-wave excitation

Topics: scattering, second-harmonic generation, Mie resonance, nanoantenna, multipolar interference, Applied optics. Photonics, TA1501-1820
Publisher: MDPI AG
Year: 2018
DOI identifier: 10.3390/photonics5030029
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