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| 1 | Quantum-optical spectroscopy of a twolevel system using an electrically driven micropillar laser as a resonant excitation source显示文摘Two-level emitters are the main building blocks of photonic quantum technologies and are model systems for the exploration of quantum optics in the solid state.Most interesting is the strict resonant excitation of such emitters to control their occupation coherently and to generate close to ideal quantum light,which is of utmost importance for applications in photonic quantum technology.To date,the approaches and experiments in this field have been performed exclusively using bulky lasers,which hinders the application of resonantly driven two-level emitters in compact photonic quantum systems.Here we address this issue and present a concept for a compact resonantly driven single-photon source by performing quantum-optical spectroscopy of a two-level system using a compact high-βmicrolaser as the excitation source.The two-level system is based on a semiconductor quantum dot(QD),which is excited resonantly by a fiber-coupled electrically driven micropillar laser.We dress the excitonic state of the QD under continuous wave excitation,and trigger the emission of single photons with strong multi-photon suppression(ge2Te0T?0:02)and high photon indistinguishability(V=57±9%)via pulsed resonant excitation at 156 MHz.These results clearly demonstrate the high potential of our resonant excitation scheme,which can pave the way for compact electrically driven quantum light sources with excellent quantum properties to enable the implementation of advanced quantum communication protocols. | Sören Kreinberg Tomislav Grbešić Max Strauß Alexander Carmele Monika Emmerling Christian Schneider Sven Höfling Xavier Porte Stephan Reitzenstein | 2018 | Light(Science & Applications)2018，7，1： | 0 |
| 2 | Unveiling the physics of microcavity lasers显示文摘Second-order coherence measurements can unambiguously determine whether a light source is generating coherent radiation,that is,whether it is a laser.In a systematic study reported by Kreinberg et al.,this measurement is used to additionally reveal intriguing physics associated with ultra-small resonators,such as the identification of sub-or super-radiance emission. | William E Hayenga Mercedeh Khajavikhan | 2017 | Light(Science & Applications)2017，6，1： | 0 |
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