• Chinese Optics Letters
  • Vol. 19, Issue 12, 123202 (2021)
Weifeng Yang1、2、3、*, Yichong Lin2, Xueyi Chen2, Yuxuan Xu2, Hongdan Zhang2、3, Marcelo Ciappina4、5, and Xiaohong Song1、2、3、**
Author Affiliations
  • 1School of Science, Hainan University, Haikou 570228, China
  • 2Research Center for Advanced Optics and Photoelectronics, Department of Physics, College of Science, Shantou University, Shantou 515063, China
  • 3Institute of Mathematics, Shantou University, Shantou 515063, China
  • 4Physics Program, Guangdong Technion - Israel Institute of Technology, Shantou 515063, China
  • 5Technion - Israel Institute of Technology, Haifa 32000, Israel
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    DOI: 10.3788/COL202119.123202 Cite this Article
    Weifeng Yang, Yichong Lin, Xueyi Chen, Yuxuan Xu, Hongdan Zhang, Marcelo Ciappina, Xiaohong Song. Wave mixing and high-harmonic generation enhancement by a two-color field driven dielectric metasurface [Invited][J]. Chinese Optics Letters, 2021, 19(12): 123202 Copy Citation Text show less

    Abstract

    High-harmonic generation in metasurfaces, driven by strong laser fields, has been widely studied. Compared to plasma, all-dielectric nanoscale metasurfaces possess larger nonlinearity response and higher damage threshold. Additionally, it can strongly localize the driven field, greatly enhancing its peak amplitude. In this work, we adopt a Fano resonant micro-nano structure with transmission peaks at different wavelengths and explore its nonlinear response by both single and two-color pump fields. Compared to the high-order harmonics induced by the first resonant wavelength, the intensity of the high-harmonic radiation results is enhanced by one order of magnitude, when the metasurface is driven by various resonant and non-resonant wavelength combinations of a two-color field.

    Video Introduction to the Article

    1. Introduction

    High-harmonic generation (HHG) was firstly, to the best of our knowledge, proved to exist in rare-gas atoms[1], and nowadays it is one of the backbones of attosecond science[25]. Typical gas-phase HHG experiments need expensive and complex experimental setups. In recent years, solid materials have been extensively used as a driven medium for HHG. One of their advantages is its high density, typically three orders of magnitude larger, allowing the HHG to happen with lower pumping laser fields[6]. Thus, solid HHG has become a subject of great interest. Investigations have shown that high harmonics generated in bulk crystals could provide new ways to manipulate and tailor light fields and have instrumental prospects for strong field photonics applications[714]. These studies will pave the way to the design of compact ultrafast and short wavelength tunable coherent light sources. Subsequent research has shown that high-order harmonics can be generated in an engineered nanoscale structure, which is able to adequately tailor the local near-field in order to reach the strong field regime. Enhancing the driving electric field by a nanostructure is the most promising way to boost the interaction between the electromagnetic field and the material, allowing it to reach the strong laser–matter interaction, with lower intensity pumping fields.

    Weifeng Yang, Yichong Lin, Xueyi Chen, Yuxuan Xu, Hongdan Zhang, Marcelo Ciappina, Xiaohong Song. Wave mixing and high-harmonic generation enhancement by a two-color field driven dielectric metasurface [Invited][J]. Chinese Optics Letters, 2021, 19(12): 123202
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