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Switchable unidirectional second-harmonic emission through GaAs nanoantennas

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publicationAOS Australian Conference on Optical Fibre Technology, ACOFT 2019 and Australian Conference on Optics, Lasers, and Spectroscopy, ACOLS 2019
EditorsArnan Mitchell, Halina Rubinsztein-Dunlop
ISBN (Electronic)9781510631403
Publication statusPublished - 2019
Publication typeA4 Article in a conference publication
EventAustralian Conference on Optical Fibre Technology and Australian Conference on Optics, Lasers, and Spectroscopy - Melbourne, Australia
Duration: 9 Dec 201912 Dec 2019

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
ISSN (Print)0277-786X
ISSN (Electronic)1996-756X


ConferenceAustralian Conference on Optical Fibre Technology and Australian Conference on Optics, Lasers, and Spectroscopy


Switching the scattering direction of high-index dielectric nanoantennas between forward and backward, via Mie resonances in the linear regime, has been widely studied, recently. However, switching the harmonic emission of nanoantennas without applying any physical change to the antennas, such as geometry, or environment, is a chal-lenging task that has not been demonstrated yet. Here, we investigate multipolar second-harmonic switch from GaAs nanoantennas. Based on the peculiar nonlinearities of zinc-blende semiconductors, we demonstrate both theoretically and experimentally unidirectional nonlinear emission routing and switching via pump polarization control. Our results offer exciting opportunities for nonlinear nanophotonics technologies, such as nanoscale light routing elements, nonlinear light sources, nonlinear imaging, multifunctional flat optical elements.


  • Dielectric nanoresonators, Mie resonance, Second harmonic generation, Unidirectional emission

Publication forum classification

Field of science, Statistics Finland