Статья

Nonlinear Metasurfaces Governed by Bound States in the Continuum

Kirill KoshelevDepartment of Nanophotonics and Metamaterials, ITMO University, St. Petersburg 197101, RussiaYutao TangDepartment of Material Science and Engineering, Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaKingfai LiDepartment of Material Science and Engineering, Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaDuk‐Yong ChoiCollege of Information Science and Technology, Jinan University, Guangdong 510632, ChinaGuixin LiDepartment of Material Science and Engineering, Shenzhen Institute for Quantum Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, ChinaYuri S. KivsharNonlinear Physics Center, Australian National University, Canberra, ACT 2601, Australia

2019en

ABI

Аннотация

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.

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Идентификаторы

DOI: 10.1021/acsphotonics.9b00700

Цитирования и источники

Цитирований: 2Использованных источников: 0

Показатели — AkademScholar