超导纳米线光学特性及其机制研究

项目名称： 超导纳米线光学特性及其机制研究

项目编号： No.61471189

项目类型： 面上项目

立项/批准年度： 2015

项目学科： 无线电电子学、电信技术

项目作者： 张蜡宝

作者单位： 南京大学

项目金额： 80万元

中文摘要： 超导纳米线是超导单光子探测器(SSPD)核心组成部分，其光学特性是影响器件光子响应和检测效率的关键因素之一。但目前其光学特性研究较少,特别是在电流偏置等条件下的光学特性尚无报道。 本项目拟研究不同温度、偏置电流和外加磁场作用下超导纳米线的反射、透射和吸收等光学特性。基于这些光学特性，结合低温超导理论,探索超导纳米线中库伯对、非平衡载流子、热点和磁通等对光学特性的影响，进而揭示超导体与光子相互作用的微观机制。通过上述研究，有望获得光子与超导体相互作用的物理规律，促进对SSPD光子响应机制的认识，推动新型SSPD器件研发。

中文关键词： 单光子探测；量子通信；超导电子器件；纳米线；光学性质

英文摘要： Superconducting nanowire is the core component of superconductor single photon detectors (SSPD). Its optical property is one of the key factors that affect the device efficiency. The present study the electrical properties of superconducting nanowires more in-depth, but few studies of its optical properties. The project intends to study the optical reflection, transmission and absorption with temperature, bias current and magnetic field on superconducting nanowires. On the basis of the existing processes and systems, superconducting nanowires of different geometries will be fabricated after further optimization of materials and device technology. The influence of temperature, current and magnetic field on the above optical properties will be investigated in experiment. Also, the relation of hot spots and flux to current and magnetic field will be studied. Then, the optical properties can reveal many micro-phenomena, such as hot spots and flux. Those enable us to explore the microscopic mechanisms between photons and superconductor. Through these studies, it is possible to facilitate the understanding of SSPD photon response mechanism to promote research and development of new SSPD devices and revealing the physical laws of superconductor-photon interaction.

英文关键词： single photon detector;quantum communication;superconductor electron device;nanowire;optical property