High-Visibility On-Chip Quantum Interference of Single Surface Plasmons
High-Visibility On-Chip Quantum Interference of Single Surface Plasmons
复制标题
单表面等离子体的高可见度片上量子干涉
DOI：
10.1103/physrevapplied.2.014004
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发表时间：
2014-07-14
影响因子：
4.6
通讯作者：
Guo, Guang-Can
中科院分区：
文献类型：
--
作者：
Cai, Yong-Jing;Li, Ming;Guo, Guang-Can
在这项工作中，两个单一的表面等离子体激元的量子干涉片上实现了使用介质加载的表面等离子体激元极化波导。高可见性（大于90%）证明了单等离子体激元的玻色子性质，并强调了实现线性光量子计算的基本量子逻辑门的可行性。本文还讨论了等离子体波导中的本征损耗对量子信息处理的影响。虽然这种效应的影响在目前的实验中可以忽略不计，但我们的研究表明，在某些情况下，这种损失可以显着降低量子干涉的可见性;因此，在设计量子光子集成电路器件时，必须仔细考虑量子相干性。
In this work, the on-chip quantum interference of two single surface plasmons is achieved using dielectric-loaded surface-plasmon-polariton waveguides. The high visibility (greater than 90%) proves the bosonic nature of single plasmons and emphasizes the feasibility of achieving basic quantum logic gates for linear optical quantum computation. The effect of intrinsic losses in plasmonic waveguides with regard to quantum-information processing is also discussed. Although the influence of this effect is negligible in the current experiment, our studies reveal that such losses can dramatically reduce quantum-interference visibility in certain cases; thus, quantum coherence must be carefully considered when designing quantum photonic integrated circuit devices.