Angular dependent terahertz emission from the interplay between nanocrystal diamond film and plasmonic metasurface

• DOI: 10.1016/j.isci.2024.108939
• Publication Date: 2024-01-21T09:41:55Z
• Authors: Shuangquan Fang; Wenpeng Guo; Yuanyuan Huang; Mingjian Shi; Xuezeng Tian; Baogang Quan; Xinlong Xu; Jian Yi; Nan Jiang; Changzhi Gu
• Keywords: Science; Q; photonics; Applied sciences; 02 engineering and technology; 0210 nano-technology; devices; Article; materials application

Composite structures integrated with metasurfaces and nonlinear films have emerged as alternative candidates to enhance response. The cooperative interaction between the two components is complicated. Herein, a split-ring resonator (SRR)-type metasurface was fabricated on free-standing nanocrystal diamond (NCD) film utilizing electron beam lithography, evaporation, lift-off process. terahertz (THz) radiation from SRR-NCD under normal incidence originates high-order magnetic resonance of SRR because NCD cannot produce detectable THz at this incident angle. As increasing angle, contribution gradually increases until reaching 40° angle limitation. results indicate that angular-dependent induced by interplay SRR. This study offers new approach investigate processes in composite structures.