在Nb2 GeTe4 /MoS2异构结构中中红外双极和单极线性极化检测
Jiayue Han1,2, Fakun Wang1, Yue Zhang3
1Center for Optoelectronics and Biophotonics, School of Electrical & Electronic Engineering, Nanyang Technological University, Singapore, 639798, Singapore.
Advanced materials (Deerfield Beach, Fla.)
|September 22, 2023
概括
这项研究介绍了一种使用二维范德瓦尔斯异构结构的新型宽带中红外极化光探测器. 该设备实现了高极化比和波长依赖的极性,用于先进的光学传感应用.
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:
- 检测光极化状态对于光学科学和工业至关重要.
- 现有的极化探测器通常依赖于窄带共振吸收.
研究的目的:
- 展示一个带宽的中红外极化光探测器,具有高极化比率 (PRs) 和波长依赖的极性.
- 探索二维范德瓦尔斯异构结构在极化检测方面的潜力.
主要方法:
- 制造一个2D无极形/同极形Nb2GeTe4/MoS2范德瓦尔斯异构结构.
- 在室温下零偏差下的光电探测器性能的表征.
- 分析底层的光伏和博洛米特机制.
主要成果:
- 光探测器在4.6微米处显示了48的高PR,在11.0微米处显示了34的高PR.
- 在3.7μm时观察到负PR为-3.38,表明波长依赖的极性.
- 该设备的性能归因于叠加的光伏和博洛米特效应.
结论:
- 展示的Nb2GeTe4/MoS2异构结构使宽带MIR极化检测成为可能.
- 光探测器显示出对偏振编码通信和偏振成像的承诺.
- 这项工作突显了VDW异构结构在先进光探测器应用中的潜力.
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