具有共振腔增强的红外探测器,采用超薄的II型超级网格:设计和模拟
Applied optics
|September 14, 2023
概括
这项研究引入了使用金属格子的共振腔增强型II超网格 (T2SL) 红外探测器. 这种新的设计显著提高了T2SL红外探测器中的光子捕获和量子效率 (QE).
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
背景情况:
- 类型II超网格 (T2SL) 红外探测器存在低光子捕获和量子效率 (QE) 的问题.
- 现有的T2SL探测器需要更厚的吸收层,从而限制了性能.
研究的目的:
- 使用金属格子设计一个共振腔增强的T2SL红外探测器.
- 为了解决T2SL红外探测器中弱光子捕获和低QE的局限性.
- 优化金属格子的参数,以提高光谱响应和吸收性.
主要方法:
- 进行模拟来分析金属格子参数 (长度,厚度,撞击角度) 的影响.
- 网格参数的优化导致了共振腔结构的开发.
- 评估了T2SL吸收层的光谱反应和吸收性.
主要成果:
- 反响腔结构显著提高了0.2微米厚的T2SL层在3-5微米范围内的吸收率.
- 吸收率的峰值在3.82μm时达到97.6%,在4.73μm时达到98.2%.
- 在峰值波长的吸收率分别从6.03%和2.3%增加到54.48%和27.91%.
结论:
- 增强共振腔的T2SL红外探测器设计改善了QE.
- 这种方法可以减少吸收层厚度,提高T2SL探测器的性能.
- 该研究为推进T2SL红外探测器技术开辟了新的途径.
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