On-chip quantum interference between silicon photon-pair sources
On-chip quantum interference between silicon photon-pair sources
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DOI：
10.1038/nphoton.2013.339
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发表时间：
2014-02-01
期刊：
影响因子：
35
通讯作者：
Thompson, M. G.
中科院分区：
文献类型：
--
作者：
Silverstone, J. W.;Bonneau, D.;Thompson, M. G.
大规模集成量子光子技术（1，2）将需要在芯片上集成相同的光子源与可重构波导电路。相对复杂的量子电路已经被证明（1-7），但很少有研究承认迫切需要将光子源和波导电路集成在芯片上（8，9）。实现这种大规模量子技术的关键一步是在波导电路中集成两个单独的光子源，并展示它们之间的高可见度量子干涉。在这里，我们报告了一个绝缘体上的硅器件，它结合了两个四波混频源的干涉仪与可重构移相器。我们配置该设备来创建和操纵双色（非简并）或同色（简并）路径纠缠或路径非纠缠光子对。我们观察到高达100.0 +/- 0.4%的可见度量子干涉片上，高达95 +/- 4%的芯片。我们的设备消除了对外部光子源的需求，为增加量子光子电路的复杂性提供了一条途径，并且是迈向完全集成量子技术的第一步。
Large-scale integrated quantum photonic technologies(1,2) will require on-chip integration of identical photon sources with reconfigurable waveguide circuits. Relatively complex quantum circuits have been demonstrated already(1-7), but few studies acknowledge the pressing need to integrate photon sources and waveguide circuits together on-chip(8,9). A key step towards such large-scale quantum technologies is the integration of just two individual photon sources within a wave-guide circuit, and the demonstration of high-visibility quantum interference between them. Here, we report a silicon-on-insulator device that combines two four-wave mixing sources in an interferometer with a reconfigurable phase shifter. We configured the device to create and manipulate two-colour (non-degenerate) or same-colour (degenerate) path-entangled or path-unentangled photon pairs. We observed up to 100.0 +/- 0.4% visibility quantum interference on-chip, and up to 95 +/- 4% off-chip. Our device removes the need for external photon sources, provides a path to increasing the complexity of quantum photonic circuits and is a first step towards fully integrated quantum technologies.