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在薄膜酸波导上使用波长敏感的超导单光子探测器

Alessandro Prencipe¹, Samuel Gyger¹, Mohammad Amin Baghban¹

¹Department of Applied Physics, KTH Royal Institute of Technology, Roslagstullsbacken 21, Stockholm SE-106 91, Sweden.

|October 23, 2023

概括

研究人员开发了一种紧的芯片上波长计,使用超导纳米线单光子探测器在薄膜酸上. 该设备在电信频段中有效运行,为先进的量子通信系统铺平了道路.

科学领域:

光子学和量子光学量子光学和量子光学
材料科学材料科学材料科学

背景情况:

酸的非线性和电光特性使其非常适合光子应用.
薄膜酸 (TFLN) 的纳米结构使得创建紧,低损耗的光学电路成为可能.
芯片上的单光子探测器对于推进集成量子光学的发展至关重要.

研究的目的:

在TFLN山脊纳米波导上实施超导纳米线单光子探测器 (SNSPD).
为了演示使用SNSPDs的波导集成波长计.
评估该设备在电信C和L频段的性能及其量子通信潜力.

主要方法:

使用NbTiN材料集成到300nm厚的TFLN脊纳米波导上制造SNSPD.
基于超导探测器对光子能量依赖的波长计运行的特征.
测量设备足迹和关键电流,以评估效率和散热.

主要成果:

在TFLN纳米波导线上成功实施SNSPD.
一个功能波导集成波长计在电信C和L频段运行的演示.
实现了紧的设备足迹 (<300 × 180 μm2) 和低关键电流 (∼12 14 μA) 以实现高效运行.

结论:

开发的基于TFLN的SNSPD波长计是集成量子光学的一个有前途的平台.
紧的尺寸和高效的操作适用于密集的芯片上应用.
这项技术推动了波长复合量子通信系统的发展.

关键词:

在芯片上的单光子探测器.在芯片上的波长计.超导纳米线单光子探测器薄膜尼酸是酸的一种.

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