Polarization Entangled Photons from Quantum Dots Embedded in Nanowires
Polarization Entangled Photons from Quantum Dots Embedded in Nanowires
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DOI：
10.1021/nl503581d
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发表时间：
2014-12-01
期刊：
影响因子：
10.8
通讯作者：
Weihs, Gregor
中科院分区：
文献类型：
--
作者：
Huber, Tobias;Predojevic, Ana;Weihs, Gregor
在这封信中，我们提出了一种新的结构产生的纠缠：一个单一的InAsP量子点嵌入在InP纳米线。这些结构可以生长在一个网站控制的方式，并表现出很高的收集效率，我们检测到每秒50万双激子计数耦合到一个单模光纤与一个标准的商业雪崩光电二极管。如果我们校正已知的设置损耗和检测器效率，我们得到15（3）%的提取效率。对于测量的偏振纠缠，我们观察到的保真度为0.76（2）的参考最大纠缠态以及0.57（6）的并发。
In this Letter, we present entanglement generated from a novel structure: a single InAsP quantum dot embedded in an InP nanowire. These structures can grow in a site-controlled way and exhibit high collection efficiency; we detect 0.5 million biexciton counts per second coupled into a single mode fiber with a standard commercial avalanche photo diode. If we correct for the known setup losses and detector efficiency, we get an extraction efficiency of 15(3) %. For the measured polarization entanglement, we observe a fidelity of 0.76(2) to a reference maximally entangled state as well as a concurrence of 0.57(6).