Highly-Efficient Longitudinal Second-Harmonic Generation from Doubly-Resonant AlGaAs Nanoantennas
by
Lei Xu 1, Mohsen Rahmani 2, Daria Smirnova 2,3, Khosro Zangeneh Kamali 2
, Guoquan Zhang 4, Dragomir Neshev 2 and 
Andrey E. Miroshnichenko 1,*
Lei Xu 1, Mohsen Rahmani 2, Daria Smirnova 2,3, Khosro Zangeneh Kamali 2, Guoquan Zhang 4, Dragomir Neshev 2 and Andrey E. Miroshnichenko 1,*
1
School of Engineering and Information Technology, University of New South Wales, Canberra ACT 2600, Australia
2
Nonlinear Physics Centre, Research School of Physics and Engineering, The Australian National University, Canberra ACT 0200, Australia
3
Institute of Applied Physics, Russian Academy of Sciences, 603950 Nizhny Novgorod, Russia
4
The MOE Key Laboratory of Weak-Light Nonlinear Photonics, School of Physics and TEDA Applied Physics Institute, Nankai University, Tianjin 300457, China
*
Author to whom correspondence should be addressed.
Photonics 2018, 5(3), 29; https://doi.org/10.3390/photonics5030029
Received: 23 August 2018 / Revised: 11 September 2018 / Accepted: 13 September 2018 / Published: 17 September 2018
(This article belongs to the Special Issue Nonlinear Dielectric Photonics and Metasurfaces)
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.
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Keywords:
scattering; second-harmonic generation; Mie resonance; nanoantenna; multipolar interference
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MDPI and ACS Style
Xu, L.; Rahmani, M.; Smirnova, D.; Zangeneh Kamali, K.; Zhang, G.; Neshev, D.; Miroshnichenko, A.E. Highly-Efficient Longitudinal Second-Harmonic Generation from Doubly-Resonant AlGaAs Nanoantennas. Photonics 2018, 5, 29.
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