Dusanowski Łukasz, Gustin Chris, Hughes Stephen, Schneider Christian, Höfling Sven
Technische Physik and Würzburg-Dresden Cluster of Excellence ct.qmat, Physikalisches Institut and Wilhelm-Conrad-Röntgen-Research Center for Complex Material Systems, University of Würzburg, Am Hubland, D-97074 Würzburg, Germany.
Department of Applied Physics, Stanford University, Stanford, California 94305, United States.
Nano Lett. 2022 May 11;22(9):3562-3568. doi: 10.1021/acs.nanolett.1c04700. Epub 2022 Apr 29.
Resonance fluorescence of two-level quantum systems has emerged as a powerful tool in quantum information processing. Extension of this approach to higher-level systems provides new opportunities for quantum optics applications. Here we introduce an all-optical tuning functionality into a well-established resonance fluorescence coherent driving scheme. We accomplish this by resonant excitation of a three-level ladder system with two laser fields utilizing Autler-Townes and ac Stark effects. We propose theoretically and demonstrate experimentally the feasibility of this approach toward all-optical spectral tuning of quantum-dot-based single-photon sources and investigate photon indistinguishability and purity levels. Our tuning technique allows for fast optical control of the quantum emitter spectrum which paves the way toward temporal and spectral shaping of the single photons, formation of topological Floquet states, or generation of high-dimensional frequency-encoded quantum states of light.
两能级量子系统的共振荧光已成为量子信息处理中的一种强大工具。将这种方法扩展到更高能级系统为量子光学应用提供了新机遇。在此，我们将全光调谐功能引入到一个成熟的共振荧光相干驱动方案中。我们通过利用奥特勒 - 汤斯效应和交流斯塔克效应，用两个激光场对三能级阶梯系统进行共振激发来实现这一点。我们从理论上提出并通过实验证明了这种方法用于基于量子点的单光子源的全光谱调谐的可行性，并研究了光子的不可区分性和纯度水平。我们的调谐技术允许对量子发射体光谱进行快速光学控制，这为单光子的时间和光谱整形、拓扑弗洛凯态的形成或高维频率编码光量子态的产生铺平了道路。
