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복잡계 이론물리 연구단
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Third-Harmonic Generation in Photonic Topological Metasurfaces

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Title
Third-Harmonic Generation in Photonic Topological Metasurfaces
Author(s)
Daria Smirnova; Sergey Kruk; Daniel Leykam; Elizaveta Melik-Gaykazyan; Duk-Yong Choi; Yuri Kivshar
Publication Date
2019-09
Journal
PHYSICAL REVIEW LETTERS, v.123, no.10, pp.103901 -
Publisher
AMER PHYSICAL SOC
Abstract
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 spin- momentum-locked edge states. We demonstrate topology-driven tunable localization of the generated harmonic fields and map the pseudospin-dependent unidirectional waveguiding of the edge states bypassing sharp corners. Our observations establish dielectric metasurfaces as a promising platform for the robust generation and transport of photons in topological photonic nanostructures.© 2019 American Physical Society
URI
https://pr.ibs.re.kr/handle/8788114/6218
ISSN
0031-9007
Appears in Collections:
Center for Theoretical Physics of Complex Systems(복잡계 이론물리 연구단) > Journal Papers (저널논문)
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