Single artificial atom photonic crystal nanocavity laser

单人造原子光子晶体纳米腔激光器

• 批准号: 20760030
• 负责人: NOMURA Masahiro
• 金额: $ 2.75万
• 依托单位: The University of Tokyo
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Young Scientists (B)
• 财政年份: 2008
• 资助国家: 日本
• 起止时间: 2008 至 2009
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-20760030/
• 关键词: フォトニック結晶; 単一量子ドット; レーザ; ナノ共振器; フォトニック結晶; 単一量子ドット; レーザ; ナノ共振器

The objective of research is the first demonstration of single semiconductor quantum dot laser using a high quality two-dimensional photonic crystal nanocavity with air-bridge structure.We have succeeded in the demonstration for the first time. This single quantum dot laser can be called as a single artificial atom laser, because a quantum dot is an artificial atom. Vacuum Rabi splitting, which is a spectral splitting in photoluminescence spectrum, can be observed when an exciton in a single quantum dot interacts with single photon in a nanocavity. There was no report on lasing in such a strongly coupled system in solid-state material. We have achieved lasing in this strongly coupled system for the first time. Moreover, the vacuum Rabi splitting is sustained at the laser threshold, which indicates that coexistence of reversible and irreversible physical processes at the same time.This achievement can be said as one of the important mile stones in the field of semiconductor lasers. Therefore, this article was published by Nature Physics, which has a very high impact factor, and was reported by several newspapers. The transition from the strong-coupling to lasing regime occurs with single-quantum-level. Therefore, this is the first step towards solid-state cavity quantum electric experiments with large number of quanta.

研究的目的是首次使用高质量的二维光子晶体纳米腔使用带有空气桥结构的单个半导体量子点激光器。我们首次在演示中取得了成功。该单个量子点激光器可以称为单个人工原子激光器，因为量子点是人造原子。当单个量子点中的激子与纳米腔中的单个光子相互作用时，可以观察到真空狂犬分裂，这是光致发光光谱中的光谱分裂。没有关于在固态材料中这种强耦合系统中激光的报道。我们首次在这个强大的耦合系统中实现了激光。此外，在激光阈值下进行了真空狂犬分裂，这表明同时可逆和不可逆的物理过程共存。这项成就可以说是半导体激光器领域的重要英里石之一。因此，本文由大自然物理学发表，该文章具有很高的影响因素，并由几家报纸报道。从强耦合到激光状态的过渡是通过单量子级进行的。因此，这是大量量子的固态空腔量子电动实验的第一步。