通过非对称双网门的太赫兹检测双层石墨烯FETs与集成的带天线
E Abidi1, A Khan1, J A Delgado-Notario1
1Nanotech Group, Facultad de Ciencias, Universidad de Salamanca, 37008 Salamanca, Spain.
Nanomaterials (Basel, Switzerland)
|February 23, 2024
概括
一个不对称的双网格门双层石墨烯场效应晶体管 (ADGG-GFET) 带有带天线显示了十倍增加的太赫兹 (THz) 检测. 这种增强的光电流响应是由于天线合和门诱导的载体调制.
科学领域:
- 特拉赫兹 (THz) 技术的使用.
- 基于石墨烯的电子产品
- 探测器物理学的物理
背景情况:
- 场效应晶体管 (FET) 是重要的电子元件.
- 石墨烯独特的电子特性使其适用于先进的应用.
- 探测特拉赫兹 (THz) 辐射需要敏感且高效的设备.
研究的目的:
- 为了研究与带天线集成的不对称双网格门双层石墨烯基场效应晶体管 (ADGG-GFET) 的太赫兹 (THz) 检测能力.
- 分析天线集成和门偏差对设备光电流响应的影响.
主要方法:
- 一个ADGG-GFET的制造与一个集成的带天线.
- 实验调查该设备对4.5K的太赫兹 (THz) 辐射 (0.15,0.3和0.6THz) 的反应.
- 在不同的顶端和后门偏差电压下分析光电流变化.
主要成果:
- 与没有天线 (1 nA) 的设备相比,集成的带天线显著提高了光电流响应 (高达 8 nA).
- 在所有测试频率和偏差电压中观察到增强的光响应.
- 载体度的门诱导调制和双层石墨烯中潜在的带隙开放有助于增强检测.
结论:
- 具有集成带天线的ADGG-GFET展示了一个高效的太赫兹 (THz) 探测器.
- 天线合和精确的门控制是实现增强光电流和灵敏性的关键.
- 这种设备对先进的太赫兹 (THz) 传感应用有很大的希望.
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