Full complex-amplitude modulation of second harmonic generation with nonlinear metasurfaces

Zelin Hao, Wenwei Liu, Zhancheng Li, Zhi Li, Guangzhou Geng, Yanchun Wang, Hua Cheng, Hammad Ahmed, Xianzhong Chen, Junjie Li, Jianguo Tian, Shuqi Chen

Research output: Contribution to journalArticlepeer-review

Abstract

Metasurfaces have shown unprecedented capabilities and flexibilities for optical wave manipulation, which provide a powerful platform for the integration and minimization of multifunctional optical devices. However, the realization of the multidimensional manipulation of harmonic waves generated by nonlinear metasurfaces is still a challenge due to the lack of a theoretical guidance. Here, an efficient design strategy of nonlinear metasurfaces based on the hydrodynamic model of the free electron dynamics is demonstrated to realize the full complex-amplitude modulation of the second harmonic generation (SHG). As a proof concept, three multifunctional nonlinear metasurfaces are designed, in which both the amplitude and the phase of the SHG waves are efficiently and independently manipulated. With numerical and experimental validations, the proposed nonlinear metasurfaces can realize the spin-selective SHG optical vortices with independent topological charges. The design strategy of nonlinear metasurfaces shall boost the applications of nonlinear metasurfaces in optical information, optical multifunctional integration, and so on.
Original languageEnglish
Article number2100207
JournalLaser and Photonics Reviews
Early online date28 Oct 2021
DOIs
Publication statusE-pub ahead of print - 28 Oct 2021

Keywords

  • full complex-amplitude modulation
  • metasurfaces
  • nonlinear optics
  • second harmonic

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

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