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Directional Single‐Photon Emission from Deterministic Quantum Dot Waveguide Structures
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2020-06-22 , DOI: 10.1002/pssr.202000115 Paweł Mrowiński 1, 2 , Peter Schnauber 1 , Arsenty Kaganskiy 1 , Johannes Schall 1 , Sven Burger 3 , Sven Rodt 1 , Stephan Reitzenstein 1
Physica Status Solidi-Rapid Research Letters ( IF 2.5 ) Pub Date : 2020-06-22 , DOI: 10.1002/pssr.202000115 Paweł Mrowiński 1, 2 , Peter Schnauber 1 , Arsenty Kaganskiy 1 , Johannes Schall 1 , Sven Burger 3 , Sven Rodt 1 , Stephan Reitzenstein 1
Affiliation
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Chiral light–matter interaction can lead to directional emission of two‐level quantum emitters in waveguides (WGs). This interesting physics effect has raised considerable attention in recent years especially in terms of on‐chip quantum systems. In this context, this work focuses on tailoring single semiconductor quantum dot–waveguide (QD–WG) systems to emit single photons with high directionality. Low‐temperature in situ electron‐beam lithography enabled by cathodoluminescence mapping is used to select suitable QDs and to integrate them deterministically into linear WG structures at specific chiral points determined by numerical calculations. Excitonic and biexcitonic emission is observed from the fabricated QD–WG structure in a confocal micro‐photoluminescence setup enabling the optical characterization in terms of directional emission of circularly polarized photons emitted by integrated QDs. The results show a high degree of anisotropy on the level of 54% for directional QD emission and antibunching in autocorrelation experiment confirming the fabricated QD–WG system, which is a prerequisite for using this effect in advanced applications in integrated quantum circuits.
中文翻译：
确定性量子点波导结构的定向单光子发射
手性光-质相互作用可导致波导（WG）中两级量子发射器的定向发射。近年来，这种有趣的物理效应引起了相当大的关注，尤其是在片上量子系统方面。在这种情况下，这项工作着重于定制单个半导体量子点波导（QD–WG）系统，以发射具有高方向性的单个光子。通过阴极发光映射实现的低温原位电子束光刻技术可用于选择合适的量子点，并将其确定性地整合到通过数值计算确定的特定手性点的线性WG结构中。在共聚焦微光致发光设置中，从装配好的QD–WG结构中观察到了激子和双激子发射，从而可以通过积分QD发射的圆偏振光子的定向发射来表征光学特性。结果表明，定向相关的QD发射和反聚束在54％的水平上具有高度的各向异性，这证实了已制造的QD-WG系统的存在，这是在集成量子电路的高级应用中使用此效应的前提。
更新日期：2020-06-22
中文翻译：
确定性量子点波导结构的定向单光子发射
手性光-质相互作用可导致波导（WG）中两级量子发射器的定向发射。近年来，这种有趣的物理效应引起了相当大的关注，尤其是在片上量子系统方面。在这种情况下，这项工作着重于定制单个半导体量子点波导（QD–WG）系统，以发射具有高方向性的单个光子。通过阴极发光映射实现的低温原位电子束光刻技术可用于选择合适的量子点，并将其确定性地整合到通过数值计算确定的特定手性点的线性WG结构中。在共聚焦微光致发光设置中，从装配好的QD–WG结构中观察到了激子和双激子发射，从而可以通过积分QD发射的圆偏振光子的定向发射来表征光学特性。结果表明，定向相关的QD发射和反聚束在54％的水平上具有高度的各向异性，这证实了已制造的QD-WG系统的存在，这是在集成量子电路的高级应用中使用此效应的前提。
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