抑制片上光子对源的外部噪声

IF 0.8 4区 物理与天体物理 Q3 PHYSICS, MULTIDISCIPLINARY Journal of the Korean Physical Society Pub Date : 2024-07-24 DOI:10.1007/s40042-024-01141-4
Woncheol Shin, Kiwon Kwon, Dongjin Lee, Heedeuk Shin
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引用次数: 0

摘要

量子光子集成电路因其尺寸、稳定性和可扩展性,是基于光子的复杂量子信息系统的理想选择。集成在这些电路中的光子对源有助于减少连接损耗。这些光子对是通过光纤向芯片泵入强光产生的,这可能会引入不必要的噪声光子,从而降低量子源的性能。在这里,我们研究了仅由片上光源产生的光子对,以改进量子光子应用。外部滤波往往会因环境影响而失效,因此我们提出在光子对产生前后使用片上滤波器来减轻外部噪声。我们制作了带有和不带片载非对称马赫-泽恩德干涉仪滤波器的硅波导,并通过实验分析了光子对的特性。结果表明,片上滤波器能有效消除外部噪声,使巧合与偶然巧合的比率提高了两倍。这表明片上滤波器在增强量子通信和计算等量子光子应用方面大有可为。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

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Suppression of external noise in on-chip photon-pair sources

Quantum photonic integrated circuits are ideal for photon-based complex quantum information systems due to their size, stability, and scalability. Photon-pair sources integrated into these circuits help reduce connection losses. These pairs are generated by pumping strong light through optical fibers into the chip, which can introduce unwanted noise photons, lowering the performance of quantum sources. Here, we studied photon pairs generated solely from on-chip sources to improve quantum photonic applications. External filtering often fails due to environmental influences, leading us to propose on-chip filters before and after photon-pair generation to mitigate external noise. We fabricated silicon waveguides with and without on-chip asymmetric Mach–Zehnder interferometer filters and analyzed photon pair properties through experiments. The results showed that on-chip filters effectively eliminate external noise, tripling the coincidence-to-accidental coincidence ratio. This suggests that on-chip filtering holds significant promise for enhancing quantum photonic applications like quantum communications and computations.

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来源期刊
Journal of the Korean Physical Society
Journal of the Korean Physical Society PHYSICS, MULTIDISCIPLINARY-
CiteScore
1.20
自引率
16.70%
发文量
276
审稿时长
5.5 months
期刊介绍: The Journal of the Korean Physical Society (JKPS) covers all fields of physics spanning from statistical physics and condensed matter physics to particle physics. The manuscript to be published in JKPS is required to hold the originality, significance, and recent completeness. The journal is composed of Full paper, Letters, and Brief sections. In addition, featured articles with outstanding results are selected by the Editorial board and introduced in the online version. For emphasis on aspect of international journal, several world-distinguished researchers join the Editorial board. High quality of papers may be express-published when it is recommended or requested.
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