Josephson Light-Emitting Diode
Josephson Light-Emitting Diode
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DOI：
10.1103/physrevlett.104.156802
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发表时间：
2010-04-16
影响因子：
8.6
通讯作者：
Kouwenhoven, Leo P.
中科院分区：
文献类型：
--
作者：
Recher, Patrik;Nazarov, Yuli V.;Kouwenhoven, Leo P.
我们考虑光学量子点，其中电子能级和空穴能级耦合到相应的超导引线。我们发现，电子和空穴重新结合产生光子在离散的能量以及连续的尾巴。此外，谱线直接探测点上的诱导超导关联。在接近所施加的偏置电压eV（sd）的能量下，存在一个参数范围，其中辐射以偏振相关光子的成对发射进行。在接近2eV（sd）的能量下，发射的光子与库珀对转移有关，并使人联想到约瑟夫森辐射。我们讨论了如何探测这些光子的相干性在SQUID几何通过单光子干涉。
We consider an optical quantum dot where an electron level and a hole level are coupled to respective superconducting leads. We find that electrons and holes recombine producing photons at discrete energies as well as a continuous tail. Further, the spectral lines directly probe the induced superconducting correlations on the dot. At energies close to the applied bias voltage eV(sd), a parameter range exists, where radiation proceeds in pairwise emission of polarization correlated photons. At energies close to 2eV(sd), emitted photons are associated with Cooper pair transfer and are reminiscent of Josephson radiation. We discuss how to probe the coherence of these photons in a SQUID geometry via single-photon interference.