论文标题
具有单光子灵敏度在t = 20 k的二维铜酸盐纳米探测器
Two-dimensional cuprate nanodetector with single photon sensitivity at T = 20 K
论文作者
论文摘要
在单光子水平上检测光是新兴光子技术的支柱之一。这是通过提供高效，宽带和快速响应的最先进的超导探测器来实现的。但是，使用低TC的超导薄膜的使用将其操作温度限制在4K以下。在这项工作中，我们演示了概念证明的纳米估计器，基于剥落的二维丘比特超导剂BI2SR2CACU2O8-δ（BSCCO），在创t = 20k的创纪录的温度下，在电信波长处表现出单photon敏感性。这些不优化的设备表现出缓慢（MS）的重置时间和低检测效率（10^（-4））。由于一种新颖的方法，我们意识到单光子敏感性在高-TC纳米探测器上的难以捉摸的前景，结合了范德华的制造技术和基于光离子辐照的非侵入性纳米图案。该结果为更广泛地应用单光子技术铺平了道路，从而放松了在电信波长下进行单光子检测的低温约束。
Detecting light at the single-photon level is one of the pillars of emergent photonic technologies. This is realized through state-of-the-art superconducting detectors that offer efficient, broadband and fast response. However, the use of superconducting thin films with low TC limits their operation temperature below 4K. In this work, we demonstrate proof-of-concept nanodetectors based on exfoliated, two-dimensional cuprate superconductor Bi2Sr2CaCu2O8-δ (BSCCO) that exhibit single-photon sensitivity at telecom wavelength at a record temperature of T = 20K. These non-optimized devices exhibit a slow (ms) reset time and a low detection efficiency (10^(-4)). We realize the elusive prospect of single-photon sensitivity on a high-TC nanodetector thanks to a novel approach, combining van der Waals fabrication techniques and a non-invasive nanopatterning based on light ion irradiation. This result paves the way for broader application of single-photon technologies, relaxing the cryogenic constraints for single-photon detection at telecom wavelength.
