一个InAs量子点闪电器的设计和性能,带有集成光探测器
Tushar Mahajan1, Allan Minns1, Vadim Tokranov1
1College of Nanotechnology, Science and Engineering, University at Albany, Albany, NY 12203, USA.
Sensors (Basel, Switzerland)
|November 27, 2024
概括
研究人员开发了一种新的InAs量子点 (QD) 闪材料. 该材料在检测α粒子和光子方面表现出有希望的性能,在AlGaAs矩阵中提高了辐射硬度.
科学领域:
- 材料科学 材料科学 材料科学
- 半导体物理 半导体物理
- 辐射检测检测器可以检测到辐射.
背景情况:
- 新型闪材料的开发对于先进的辐射检测至关重要.
- 化 (InAs) 量子点 (QD) 为闪光应用提供可调节的光学特性.
- 量子点与光探测器 (PD) 的集成对于高效的信号读出至关重要.
研究的目的:
- 开发和评估一个新的InAs量子点 (QD) 闪材料,该材料托管在GaAs矩阵中.
- 为QD发射频谱设计一个优化的集成光电探测器 (PD).
- 评估开发的闪光材料的性能和辐射硬度.
主要方法:
- 在GaAs矩阵内制造InAs QD.
- 使用InAlGaAs变态缓冲层设计和集成一个光探测器.
- 使用扫描激光激发的光发光 (PL) 收集效率测量.
- 对α粒子和光子的探测器响应评估.
- 在1 MeV质子植入下进行辐射硬度测试.
主要成果:
- 实现的电子产量为α粒子的13电子/keV,光子的30-60电子/keV.
- 观察到的能量分辨率为阿尔法粒子的12%,受光学损失限制.
- 与GaAs和InGaAs相比,在AlGaAs矩阵中对InAsQDs的辐射硬度得到了改善.
- PL灭分析显示出缺陷诱导的非辐射重组.
结论:
- 开发的InAs QD/GaAs闪材料显示了辐射检测的潜力.
- 优化的光电探测器集成提高了信号收集效率.
- 在AlGaAs中嵌入QD显著提高了辐射硬度,这对于恶劣的环境至关重要.
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