论文标题
狭窄的量子量子发射极的大范围频率调整
Large-Range Frequency Tuning of a Narrow-Linewidth Quantum Emitter
论文作者
论文摘要
半导体量子点单光子源和rubidium量子存储器的混合系统代表了未来光子量子中继器的有希望的结构。关键挑战之一是将量子点的发射频率与rubidium原子的过渡频率相匹配，同时保留相关的发射特性。在这里，我们证明了从窄线宽（接近转移限制）量子点对发射的双向频率调节。频率调整是基于压电应变 - 放大装置的，该设备可以为厚的散装样品施加重大应力。诱导的应变将量子点的发射频率移至总范围为$ 1.15 \ \ text {thz} $，比其线宽大三个数量级。在整个整个调整过程中，都保留了量子点的光谱特性及其单光子发射特性。我们的结果表明，外部应力可以用作有前途的工具，用于可逆量子点的可逆频率调整，并将波铺在量子点的实现-Rubidium Atoms接口以实现量子网络。
A hybrid system of a semiconductor quantum dot single photon source and a rubidium quantum memory represents a promising architecture for future photonic quantum repeaters. One of the key challenges lies in matching the emission frequency of quantum dots with the transition frequency of rubidium atoms while preserving the relevant emission properties. Here, we demonstrate the bidirectional frequency-tuning of the emission from a narrow-linewidth (close-to-transform-limited) quantum dot. The frequency tuning is based on a piezoelectric strain-amplification device, which can apply significant stress to thick bulk samples. The induced strain shifts the emission frequency of the quantum dot over a total range of $1.15\ \text{THz}$, about three orders of magnitude larger than its linewidth. Throughout the whole tuning process, both the spectral properties of the quantum dot and its single-photon emission characteristics are preserved. Our results show that external stress can be used as a promising tool for reversible frequency tuning of high-quality quantum dots and pave the wave towards the realisation of a quantum dot -- rubidium atoms interface for quantum networking.
