Third-Harmonic Generation in Photonic Topological Metasurfaces

被引：190

作者：

Smirnova, Daria ^{[1
,2
]}

Kruk, Sergey ^{[1
]}

Leykam, Daniel ^{[3
]}

Melik-Gaykazyan, Elizaveta ^{[1
,4
]}

Choi, Duk-Yong ^{[5
]}

Kivshar, Yuri ^{[1
]}

机构：

[1] Australian Natl Univ, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia

[2] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

[3] Inst for Basic Sci Korea, Ctr Theoret Phys Complex Syst, Daejeon 34126, South Korea

[4] Lomonosov Moscow State Univ, Fac Phys, Moscow 119991, Russia

[5] Australian Natl Univ, Laser Phys Ctr, Canberra, ACT 2601, Australia

来源：

PHYSICAL REVIEW LETTERS | 2019年 / 123卷 / 10期

基金：

澳大利亚研究理事会; 俄罗斯基础研究基金会;

关键词：

NANOPARTICLES DRIVEN; EDGE STATES; SILICON; OPTICS;

D O I：

10.1103/PhysRevLett.123.103901

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 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.

引用

页数：6

共 37 条

[1] Unidirectional edge states in topological honeycomb-lattice membrane photonic crystals [J].