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在CMOS兼容Si纳米片上使用GS-MBE使用单体集成GaAs纳米岛

Adriana Rodrigues¹, Anagha Kamath¹, Hannah-Sophie Illner¹

¹Institut für Physik, Humboldt Universität zu Berlin, Newtonstr. 15, 12489 Berlin, Germany.

Nanomaterials (Basel, Switzerland)

|July 25, 2025

概括

我们在纳米片上演示了GaAs nanoheteroepitaxy,使先进的光电子设备的单体集成成为可能. 增长条件影响岛屿的大小,结构和结合,这对于CMOS兼容的纳米光子学至关重要.

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
纳米技术纳米技术

背景情况:

III-V半导体与 (Si) 的单体集成对于下一代光电子和光子设备至关重要.
当前的集成方法在实现高质量,无缺陷的接口方面面临挑战.

研究的目的:

通过使用气体源分子束表达式 (GS-MBE) 在 (Si) 纳米片上研究化 (GaAs) 纳米岛的选择性生长.
了解生长条件对GaAs纳米岛的形态,晶体结构和缺陷形成的影响.
探索CMOS兼容的基于Si的纳米光子技术的潜力.

主要方法:

制造配套的金属氧化物半导体 (CMOS) 兼容的Si(001) 纳米尖晶片.
气体源分子束表达式 (GS-MBE) 对于GaAs纳米 heteroepitaxy (NHE).
使用扫描电子显微镜 (SEM),高分辨率X射线衍射 (HRXRD) 和光发光 (PL) 光谱学进行表征.

主要成果:

在Si纳米片上实现了完全放松的GaAs纳米岛的选择性生长,具有单模尺寸分布 (100-280nm有效直径) 以较低的沉积率.
在较小的岛屿上观察到四个不同的面向 ({001} 平面).
确定了向双模尺寸分布的过渡,并增加了结合体积分数,沉积量更高,同时出现了具有多个结晶学方面的大岛.

结论:

增长条件显著影响GaAs纳米岛形态,晶体结构,并在Si纳米片上的NHE过程中形成缺陷.
经常观察到双胞胎,其患病率随着沉积而增加.
这些发现提供了对纳米 heteroepitaxial 增长动态的关键见解,为先进的 CMOS 兼容 Si 基纳米光子设备铺平了道路.

关键词:

在Si光子学中.缺陷缺陷缺陷缺陷缺陷在Si上的表轴GaAs.纳米黑色的epitaxyxy可以使用.

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