Electrically Tunable Single-Photon Source Triggered by a Monolithically Integrated Quantum Dot Microlaser
Electrically Tunable Single-Photon Source Triggered by a Monolithically Integrated Quantum Dot Microlaser
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DOI：
10.1021/acsphotonics.7b00119
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发表时间：
2017-04-01
期刊：
影响因子：
7
通讯作者：
Reitzenstein, Stephan
中科院分区：
文献类型：
--
作者：
Munnelly, Pierce;Heindel, Tobias;Reitzenstein, Stephan
我们报告了一种基于量子点微柱的单光子源，该源展示了通过施加电场并由片上回音壁模式微型激光器驱动的可调谐发射能量。在这个概念中，腔增强单光子源与电驱动的相干激发源单片集成。该器件概念具有几十μA的低激光阈值电流，占地面积小至200μm(2)，并且在微型激光器的脉冲电激励下表现出高单光子纯度，g((2))(0)低至0.07+/-0.03。沿着单光子发射器的生长方向施加的电场允许通过量子限制斯塔克效应将发射调谐高达1.1 meV，使其与周围微柱谐振器的基本模式共振，从而通过珀塞尔效应增强发射。
We report on a quantum dot micropillar-based single-photon source demonstrating tunable emission energy via an applied electric field and driven by an on-chip, whispering-gallery-mode microlaser. In this concept the cavity-enhanced single-photon source is monolithically integrated with an electrically driven, coherent excitation source. The device concept features low laser-threshold currents of a few tens of mu A, has a small footprint of 200 mu m(2) and demonstrates high single-photon purity with g((2))(0) as low as 0.07 +/- 0.03 under pulsed electrical excitation of the microlaser. The electric field applied along the growth direction of the single-photon emitter allows the emission to be tuned by up to 1.1 meV via the quantum-confined Stark effect, bringing it into resonance with the fundamental mode of the surrounding micropillar resonator for enhanced emission via the Purcell effect.