Coherent Interaction of a Few-Electron Quantum Dot with a Terahertz Optical Resonator
Coherent Interaction of a Few-Electron Quantum Dot with a Terahertz Optical Resonator
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DOI：
10.1103/physrevlett.132.066901
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发表时间：
2024-02-09
影响因子：
8.6
通讯作者：
Hirakawa，Kazuhiko
中科院分区：
文献类型：
--
作者：
Kuroyama，Kazuyuki;Kwoen，Jinkwan;Hirakawa，Kazuhiko
研究了量子点太赫兹共振腔耦合系统中的光-物质混合激发。我们利用二维电子系统在太赫兹开口环谐振器（SRR）附近制备了一个栅定义量子点。通过用THz辐射照射系统，QD显示出电流变化，其光谱表现出QD中的电子与SRR之间的相干耦合以及二维电子系统与SRR之间的耦合。后者耦合进入超强耦合制度和量子点中的电子激发也表现出相干耦合与SRR具有显着大的耦合常数，尽管事实上，只有少数电子驻留在量子点。
We have investigated light-matter hybrid excitations in a quantum dot (QD) THz resonator coupled system. We fabricate a gate-defined QD near a THz split-ring resonator (SRR) by using atwo-dimensional electron system. By illuminating the system with THz radiation, the QD shows a current change whose spectrum exhibits coherent coupling between the electrons in the QD and the SRR as well as coupling between the two-dimensional electron system and the SRR. The latter coupling enters the ultrastrong coupling regime and the electron excitation in the QD also exhibits coherent coupling with the SRR with the remarkably large coupling constant, despite the fact that only a few electrons reside in the QD.