旋转过效率的室温电场控制,用于在缺陷功能0D-2D混合纳米结构中增强光学旋转偏振调节
Soyoung Park1, Satoshi Hiura1, Hiroto Kise1
1Faculty of Information Science and Technology, Hokkaido University, 060-0814, Japan. hiura@ist.hokudai.ac.jp.
Nanoscale
|October 11, 2023
概括
电场现在可以在室温下控制半导体量子点中的光学自旋偏振. 这一突破增强了先进的光电子设备的旋转极化.
科学领域:
- 螺旋电子学和光电子学
- 半导体纳米结构的半导体
背景情况:
- 基于旋转的信息处理需要在半导体量子点 (QD) 中对电子旋转极化进行电场控制.
- 目前的方法面临着由于注射过程中的快速旋转损失而在室温 (RT) 时的旋转偏振度和控制范围的限制.
研究的目的:
- 为了证明在RT时在InAs QD中对光学自旋偏振的电场控制.
- 研究使用缺陷功能的GaNAs量子井 (QW) 作为用于增强偏振的自旋波器.
主要方法:
- 制造INAs QDs道配合一个功能缺陷的GaNAs QW旋转波器.
- 在RT时在电场调制下测量光学自旋偏振.
- 超快速的时间分辨率测量以分析短暂的极化动态.
主要成果:
- 在RT时使用InAs QDs与GaNAs QW旋转波器实现了15-40%范围内的光学旋转偏振的电场控制.
- 证明过渡极化为30-60%在100 psi以内,取决于电场.
- 与InAs QD相比,观察到显著增强的极化控制与InGaAs QW (1-4%控制) 相结合.
结论:
- 具有缺陷功能的GaNAs QW通过电场依赖的旋转过来实现放大旋转偏振,增强对电子旋转偏振的控制.
- 这种方法提供了一种新的方法,通过电场诱导的旋转放大开关来调节光半导体中的电子旋转极化.
- 这些发现为在室温下基于自旋的先进光电信息处理铺平了道路.
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