控制在石墨烯中的光热电定向光电流,带宽超过400 GHz
Stefan M Koepfli1, Michael Baumann2, Robin Gadola2
1ETH Zurich, Institute of Electromagnetic Fields (IEF), Zurich, Switzerland. stefan.koepfli@ief.ee.ethz.ch.
Nature communications
|August 26, 2024
概括
我们开发了一种自动供电的石墨烯光探测器,其频率响应超过400GHz. 该设备利用光热电效应进行快速,零偏差的红外探测,性能优于其他技术.
科学领域:
- 光电学是指光电子产品.
- 材料科学 材料科学 材料科学
- 纳米技术纳米技术
背景情况:
- 红外光探测需要具有特定吸收性质的成本效益高的材料.
- 石墨烯独特的光电子特性为宽带红外探测提供了潜力.
- 现有的石墨烯光探测器往往需要复杂的优化,以实现高速,低噪音的操作.
研究的目的:
- 为了演示具有超高频响应的自动供电石墨烯光探测器.
- 调查光热电流用于快速光检测的使用.
- 探索石墨烯在先进的红外传感应用中的潜力.
主要方法:
- 石墨烯与超材料完美吸收架构的整合.
- 使用不对称的共振器来诱导定向光电流.
- 光探测器的频率响应和检测机制的特征.
主要成果:
- 实现了一种自动供电的石墨烯光探测器,其频率响应超过400 GHz.
- 观察到与光热电效应相关的近似瞬间反应.
- 证明漂移/扩散时间优化对于高速性能是不必要的.
结论:
- 石墨烯中的光热电定向光电流为超快,零偏差光探测器提供了一条道路.
- 这种方法超过了许多现有的石墨烯光探测器的带宽限制.
- 开发的技术对下一代红外传感有前途.
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