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arXiv 2109.08489quant-phcond-mat.mtrl-sci
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单锂酸盐微立方体产生宽带光子对

Broadband photon pair generation from a single lithium niobate microcube

Ngoc My Hanh Duong, Gregoire Saerens, Flavia Timpu, Maria Teresa Buscaglia, Vincenzo Buscaglia, Andrea Morandi, Jolanda S. Muller, Andreas Maeder, Fabian Kaufma… 展开作者

Ngoc My Hanh Duong, Gregoire Saerens, Flavia Timpu, Maria Teresa Buscaglia, Vincenzo Buscaglia, Andrea Morandi, Jolanda S. Muller, Andreas Maeder, Fabian Kaufmann, Alexander Sonltsev, Rachel Grange

摘要:

非经典光源受到高度追捧,因为它们是量子通信和量子计算设备的组成部分。典型的源依赖于不紧凑的块状晶体,并且由于相位匹配条件而具有有限的带宽。在这项工作中,我们证明了从一个独立的锂离子微立方体在电信波长的光子对的产生通过自发参量下转换过程。从尺寸为~4微米的单个微立方体获得的最大光子对产生速率为~80 Hz,导致每单位体积的~1.2 GHz/Wm的效率,这比大体积非线性晶体中的光子对产生效率高一个数量级。通过溶剂热方法合成微立方体,通过自下而上组装提供可扩展设备的可能性。我们的工作构成了一个重要的一步,在实现紧凑的非经典光源的宽带可调谐性的各种应用在量子通信,量子计算,和量子精密测量。

英文摘要:

Nonclassical light sources are highly sought after as they are an integral part of quantum communication and quantum computation devices. Typical sources rely on bulk crystals that are not compact and have limited bandwidth due to phase-matching conditions. In this work, we demonstrate the generation of photon pairs from a free-standing lithium niobate microcube at the telecommunication wavelength through the spontaneous parametric down-conversion process. The maximum photon pair generation rate obtained from a single microcube with the size of ~4 microns is ~80 Hz, resulting in an efficiency of ~1.2 GHz/Wm per unit volume, which is an order of magnitude higher than the efficiency of photon-pair generation in bulky nonlinear crystals. The microcubes are synthesized through a solvothermal method, offering the possibility for scalable devices via bottom-up assembly. Our work constitutes an important step forward in the realization of compact nonclassical light sources with broadband tunability for various applications in quantum communication, quantum computing, and quantum metrology.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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