Karli Yusuf, Kappe Florian, Remesh Vikas, Bracht Thomas K, Münzberg Julian, Covre da Silva Saimon, Seidelmann Tim, Axt Vollrath Martin, Rastelli Armando, Reiter Doris E, Weihs Gregor
Institut für Experimentalphysik, Universität Innsbruck, Innsbruck 6020, Austria.
Institut für Festkörpertheorie, Universität Münster, Münster 48149, Germany.
Nano Lett. 2022 Aug 24;22(16):6567-6572. doi: 10.1021/acs.nanolett.2c01783. Epub 2022 Jul 6.
The quest for the perfect single-photon source includes finding the optimal protocol for exciting the quantum emitter. Coherent optical excitation was, up until now, achieved by tuning the laser pulses to the transition frequency of the emitter, either directly or in average. Recently, it was theoretically discovered that an excitation with two red-detuned pulses is also possible where neither of which would yield a significant upper-level population individually. We show that the so-called swing-up of quantum emitter population (SUPER) scheme can be implemented experimentally with similar properties to existing schemes by precise amplitude shaping of a broadband pulse. Because of its truly off-resonant nature, this scheme has the prospect of powering high-purity photon sources with superior photon count rate.
对完美单光子源的探索包括寻找激发量子发射器的最佳方案。到目前为止，相干光激发是通过将激光脉冲直接或平均调谐到发射器的跃迁频率来实现的。最近，从理论上发现，用两个红失谐脉冲进行激发也是可行的，其中任何一个脉冲单独都不会产生显著的上能级粒子数。我们表明，通过对宽带脉冲进行精确的幅度整形，可以在实验中实现具有与现有方案类似特性的所谓量子发射器粒子数提升（SUPER）方案。由于其真正的非共振特性，该方案有望为具有卓越光子计数率的高纯度光子源提供动力。
