高性能可见到SWIR光电探测器基于分层WS2异质连接与捕捉光的金字塔黑色
Kritika Bhattacharya1, Nahid Chaudhary2, Prashant Bisht3
1Centre for Applied Research in Electronics, Indian Institute of Technology, Delhi, New Delhi 110016, India.
ACS applied materials & interfaces
|August 31, 2024
概括
这项研究引入了一种新的WS2 / 黑色光探测器,具有增强的光吸收和在可见到短波红外波长的可见到短波红外波长的卓越性能. 黑色的德国.
科学领域:
- 材料科学 材料科学 材料科学
- 光电学是指光电子产品.
- 半导体物理 半导体物理
背景情况:
- 像WS2这样的过渡金属二甲基化物 (TMD) 正在探索光电子应用.
- (Ge) 是光电探测器的关键材料,但可以提高其吸收性.
- 与传统的Ge相比,黑色 (b-Ge) 提供了增强的光吸收特性.
研究的目的:
- 开发和描述一个WS2/b-Ge异质连接光探测器.
- 为了研究黑色的捕光能力所带来的性能提升.
- 为了证明从可见到短波红外 (SWIR) 波长的宽带检测.
主要方法:
- 在湿蚀刻的上使用脉冲激光沉积制造WS2/b-Ge异质连接.
- 在中创建亚微米金字塔结构,以增强光吸收.
- 光探测器性能的表征,包括光响应性和响应速度.
- 使用有限差异时间域 (FDTD) 模拟的理论验证.
主要成果:
- WS2/b-Ge光探测器在可见到SWIR光谱中表现出卓越的性能.
- 黑色日耳曼在850-1750nm之间吸收的光比传统的Ge多25%.
- 在1540nm达到0.65A/W的峰值光响应度,是WS2/Ge.的两倍多.
- 与最先进的设备相比,表现出更好的响应能力和响应速度.
结论:
- WS2/b-Ge异质连接光探测器提供了显著的性能改进.
- 增强的性能归因于金字塔的捕光效应.
- 这种新型设备显示了高效宽带光线检测的巨大潜力.
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