非马科维亚洞过量噪声在雪崩无形薄膜薄膜
Atreyo Mukherjee1, Zhihang Han1, Le Thanh Triet Ho1
1Department of Electrical Engineering, College of Engineering and Applied Sciences, Stony Brook University, Stony Brook, New York 11794, United States.
ACS omega
|July 10, 2023
概括
无形 (a-Se) 显示出低噪音雪崩光二极管的潜力. 它独特的热孔传输特性使得超低的过量噪声因素成为可能,为固态光倍增器铺平了道路.
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
- 设备物理 设备物理
背景情况:
- 雪崩光二极管 (APD) 需要较低的过量噪声因子来提高信号与噪声的比率.
- 无形 (a-Se) 是一种宽带隙材料,有可能形成固态雪崩层.
- 单载波孔冲击电离增益和超低热生成率是a-Se的关键特性.
研究的目的:
- 为了调查热孔运输在a-Se的历史依赖性和非马科维特性质.
- 为了模拟a-Se薄膜中的孔余噪声因子作为雪崩收益的函数.
- 探索a-Se的潜力,以创建无噪声增益的固态光倍增器.
主要方法:
- 蒙特卡洛 (MC) 随机步行模拟单洞免费飞行.
- 散射相互作用的建模,包括声子,混乱,孔双极和冲击电离.
- 对0.1-15μm a-Se薄膜的孔余噪声因子的模拟.
主要成果:
- 在a-Se中的洞余噪声因子随着电场的增加而减少,影响电离增强和设备厚度.
- 一个高斯雪崩值距离分布和死空间距离解释了洞的历史依赖的分支.
- 模拟了100nm a-Se薄膜的超低非马科维亚过量噪声因子约为1,在雪崩收益为1000时.
结论:
- 在a-Se中洞雪崩的非局部/非马科维亚性质可以在未来的探测器设计中得到利用.
- 无形提供了一条途径,以实现真正的无噪声增益的固态光倍增器.
- 这项研究强调a-Se作为高性能光探测器的有希望的材料.
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