平版印刷术
太赫兹辐射
材料科学
光子学
光电子学
相变
太赫兹超材料
光学
工程物理
物理
远红外激光器
激光器
作者
Tian Zhang,Xieyu Chen,Shoujun Zhang,Kuan Liu,Yongxiang Xu,Xiaohan Jiang,Haiyang Li,Xi Feng,Qingwei Wang,Yunqing Lu,kemeng Wang,Tun Cao
出处
期刊:Photonics Research
[The Optical Society]
日期:2023-03-31
卷期号:11 (4): 669-669
被引量:1
摘要
High-performance terahertz (THz) devices with reconfigurable features are highly desirable in many promising THz applications. However, most of the existing reconfigurable THz elements are still limited to volatile responses, single functionality, and time-consuming multistep manufacturing procedures. In this paper, we report a lithography-free approach to create reconfigurable and nonvolatile THz components by exploring the reversible, nonvolatile, and continuous THz modulation capability of the phase change material Ge 2 Sb 2 Te 5 . As a proof of concept, THz gratings with significant Rayleigh anomalies and diffraction as well as ultrathin THz flat lenses with subwavelength and ultra-broadband focusing capabilities are designed and fabricated on ultrathin Ge 2 Sb 2 Te 5 films using the presented photo-imprint strategy. Moreover, such a method can also be adopted to create more complex THz devices, such as Pancharatnam–Berry phase metasurfaces and grayscale holographic plates. With these findings, the proposed method will provide a promising solution to realize reconfigurable and nonvolatile THz elements.
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