半导体量子点中的高轨道孔的连贯控制
Jun-Yong Yan1, Chen Chen1, Xiao-Dong Zhang1
1Interdisciplinary Center for Quantum Information, State Key Laboratory of Extreme Photonics and Instrumentation, College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, China.
Nature nanotechnology
|July 24, 2023
概括
研究人员开发了一种全光学方法,使用刺激的奥格尔过程控制量子点中的高轨道状态,从而使新的量子光子设备成为可能.
科学领域:
- 量子光学和光子学 量子光学和光子学
- 半导体纳米结构的半导体
- 量子信息科学 量子信息科学
背景情况:
- 半导体量子点是光子量子技术的关键,使非经典光源和量子逻辑门成为可能.
- 量子点中电荷载体的连贯控制通常仅限于最低的轨道状态.
- 控制高轨道状态需要可调节的太赫兹脉冲,这构成了重大的技术挑战.
研究的目的:
- 展示一种全光学方法,用于在量子点中连贯控制高轨道状态.
- 为了研究一个刺激的奥格尔过程对操纵电荷载体的连贯动态.
- 探索这些高轨道状态中的洞的放松机制和时间尺度.
主要方法:
- 利用刺激的奥格尔过程对高轨道孔状态进行全光学操纵.
- 采用拉比振荡和拉姆齐干扰实验来证实过程的连贯性.
- 测量了孔放松时间,以探测量子点的基本性质.
主要成果:
- 在不需要太赫兹脉冲的情况下,成功证明了对高轨道状态的连贯控制.
- 通过观察到的拉比振荡和拉姆齐干扰,证实了受刺激的奥格尔过程的连贯性.
- 测量了一个洞的放松时间为161比秒,归因于语音瓶效应.
结论:
- 全光学刺激的奥格尔过程为量子点中高轨道状态的连贯控制提供了一条新的途径.
- 这种方法有助于研究量子发射器中的放松机制等基本性质.
- 开辟了开发基于轨道的新型量子光子设备和推进量子技术的途径.
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