Nonlinear Metasurfaces Governed by Bound States in the Continuum

被引:407
|
作者
Koshelev, Kirill [1 ,2 ]
Tang, Yutao [3 ]
Li, Kingfai [3 ]
Choi, Duk-Yong [4 ,5 ]
Li, Guixin [3 ]
Kivshart, Yuri [1 ,2 ]
机构
[1] Australian Natl Univ, Nonlinear Phys Ctr, Canberra, ACT 2601, Australia
[2] ITMO Univ, Dept Nanophoton & Metamat, St Petersburg 197101, Russia
[3] Southern Univ Sci & Technol, Shenzhen Inst Quantum Sci & Engn, Dept Mat Sci & Engn, Shenzhen 518055, Peoples R China
[4] Australian Natl Univ, Laser Phys Ctr, Canberra, ACT 2601, Australia
[5] Jinan Univ, Coll Informat Sci & Technol, Guangzhou 510632, Guangdong, Peoples R China
基金
俄罗斯科学基金会; 中国国家自然科学基金; 澳大利亚研究理事会;
关键词
nanophotonics; nonlinear optics; bound states in the continuum; meta-optics; all-dielectric metasurfaces; third-harmonic generation; 3RD HARMONIC-GENERATION; 2ND-HARMONIC GENERATION; 3RD-HARMONIC GENERATION; METAMATERIALS; RESONATORS;
D O I
10.1021/acsphotonics.9b00700
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
Nonlinear nanostructured surfaces provide a paradigm shift in nonlinear optics with new ways to control and manipulate frequency conversion processes at the nanoscale, also offering novel opportunities for applications in photonics, chemistry, material science, and biosensing. Here, we develop a general approach to employ sharp resonances in metasurfaces originated from the physics of bound states in the continuum for both engineering and enhancing the nonlinear response. We study experimentally the third-harmonic generation from metasurfaces composed of symmetry-broken silicon meta-atoms and reveal that the harmonic generation intensity depends critically on the asymmetry parameter. We employ the concept of the critical coupling of light to the metasurface resonances to uncover the effect of radiative and nonradiative losses on the nonlinear conversion efficiency.
引用
收藏
页码:1639 / 1644
页数:11
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