基于二氧化瓦纳相位过渡的多场调制的Spintronic Terahertz发射器
Ting Zhou1, Liang Li1, Yangkai Wang2
1National Synchrotron Radiation Laboratory, School of Nuclear Science and Technology, University of Science and Technology of China, Hefei, Anhui 230029, P. R. China.
ACS applied materials & interfaces
|March 6, 2024
概括
研究人员使用VO2/Ni/Pt薄膜开发了一种新型的自旋电子太赫兹 (THz) 发射器. 该设备为紧的THz系统提供高效,可调节的THz波生成和调制.
科学领域:
- 太赫兹 (THz) 在光电子和光电学中使用.
- 这就是Spintronics.
- 材料科学是一种材料科学.
背景情况:
- 高效生成和调制太赫兹 (THz) 波对于成像,光谱和通信等应用至关重要.
- 由于THz光电子设备的集成日益增加,THz系统的小型化至关重要.
- 将THz源与可扩展的芯片内发射器的调制器集成,仍然是一个重大挑战.
研究的目的:
- 提出和演示一种新的多场调制的自旋式THz发射器.
- 研究VO2/Ni/Pt多层结构对THz波生成的调制能力.
- 使用热或电刺激实现THz发射的高效调制.
主要方法:
- 由二氧化 (VO2), (Ni) 和 (Pt) 组成的多层膜结构的制造.
- 利用VO2层的相位过渡特性调节THz排放.
- 应用热和电刺激来控制旋转式THz发射器的调制深度.
主要成果:
- 成功开发了一种具有0-3 THz宽带区域的自旋式 THz发射器.
- 发射器通过热和电刺激表现出高效的调制,实现了分别91.8%和97.3%的调制深度.
- VO2层的相位过渡使调制深度大约为一个数量级.
结论:
- 拟议的多场调制的自旋式THz发射器表现出高效率和可调性.
- 这项技术为集成下一代芯片THz源和调制器提供了一个有前途的途径.
- 该设备的特性非常适合紧和可扩展的THz系统.
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