Improving Indistinguishability of Single Photons from Colloidal Quantum Dots Using Nanocavities
Improving Indistinguishability of Single Photons from Colloidal Quantum Dots Using Nanocavities
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DOI：
10.1021/acsphotonics.9b01481
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发表时间：
2019-12-01
期刊：
影响因子：
7
通讯作者：
Majumdar, Arka
中科院分区：
文献类型：
--
作者：
Saxena, Abhi;Chen, Yueyang;Majumdar, Arka
胶体量子点由于其稳健的合成过程和与纳米光子平台的直接集成而作为量子发射器获得了积极的研究兴趣。然而，在室温下从胶体量子点获得不可区分的光子从根本上是具有挑战性的，因为它们遭受极大的失相速率。在这里，我们提出了一种实验上可行的方法，从非相干泵浦的溶液处理的胶体量子点耦合到一个系统的纳米腔获得不可分辨的单光子。我们表明，通过将胶体量子点耦合到一对氮化硅腔，我们可以从胶体量子点获得与其他主要量子发射体（如缺陷中心和自组装量子点）相当的单光子源性能。
Colloidal quantum dots have garnered active research interest as quantum emitters due to their robust synthesis process and straightforward integration with nanophotonic platforms. However, obtaining indistinguishable photons from the colloidal quantum dots at room temperature is fundamentally challenging because they suffer from an extremely large dephasing rate. Here we propose an experimentally feasible method of obtaining indistinguishable single photons from an incoherently pumped solution-processed colloidal quantum dot coupled to a system of nanocavities. We show that by coupling a colloidal quantum dot to a pair of silicon nitride cavities, we can obtain comparable performance of a single photon source from colloidal quantum dots as other leading quantum emitters like defect centers and self-assembled quantum dots.