带间级联LWIR探测器的光学特征与II型InAs/InAsSb超级晶格吸收器
Krzysztof Murawski1, Kinga Majkowycz1, Małgorzata Kopytko1
1Institute of Applied Physics, Military University of Technology, 2 Kaliskiego Street, 00-908 Warsaw, Poland.
Nanomaterials (Basel, Switzerland)
|September 13, 2024
概括
这项研究描述了一种新的无长波红外探测器,使用II型超级网. 研究人员确定了关键的光学转换和缺陷能量状态,这对于先进的红外探测应用至关重要.
科学领域:
- 材料科学 材料科学 材料科学
- 凝聚物质物理学 凝聚物质物理学
- 光电学是指光电子产品.
背景情况:
- 类型II超级网格 (T2SL) 对于先进的红外探测器至关重要.
- 无 (无Ga) 吸收器在探测器性能方面提供了潜在的优势.
- 长波红外 (LWIR) 探测对于各种应用至关重要.
研究的目的:
- 为了对LWIR跨带级联探测器的无Ga InAs/InAsSb吸收器进行表征.
- 为了确定T2SL异构结构内的光学转换和缺陷能量状态.
- 为了将实验发现与理论计算相关联.
主要方法:
- 分子束化 (MBE) 用于异构结构的生长.
- 高分辨率X射线衍射 (HRXRD) 用于结晶学质量评估.
- 光发光 (PL) 和光谱响应 (SR) 用于光学表征.
主要成果:
- 对于吸收层,在300K时确定了116 meV的有效能量差距 (Eg).
- 确定了85 meV和112 meV的微频段过渡和缺陷能量状态.
- 观察到温度依赖的接受器水平过渡.
结论:
- 这项研究成功地描述了无Ga的InAs/InAsSb T2SL吸收器.
- 精确确定光学转换和缺陷状态,帮助检测器设计.
- 这些发现为开发高性能LWIR探测器提供了宝贵的见解.
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