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Third-Harmonic Generation in Photonic Topological Metasurfaces

Smirnova, Daria; Kruk, Sergey; Leykam, Daniel; Melik-Gaykazyan, Elizaveta; Choi, Duk-Yong; Kivshar, Yuri


We study nonlinear effects in two-dimensional photonic metasurfaces supporting topologically protected helical edge states at the nanoscale. We observe strong third-harmonic generation mediated by optical nonlinearities boosted by multipolar Mie resonances of silicon nanoparticles. Variation of the pump-beam wavelength enables independent high-contrast imaging of either bulk modes or spinmomentum-locked edge states. We demonstrate topology-driven tunable localization of the...[Show more]

CollectionsANU Research Publications
Date published: 2019
Type: Journal article
Source: Physical Review Letters
DOI: 10.1103/PhysRevLett.123.103901
Access Rights: Open Access


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