主讲人：尤立星

时 间：2016年10月14日（周五）下午3:45

地 点：理工北楼204会议室

主 办：物电学院、省现代检测技术与智能系统重点实验室

报告内容简介：超导纳米线单光子探测技术（SNSPD）自本世纪初发现以来，得到了飞速的发展。一方面研究结果显示其探测效率、暗计数、时间抖动、速度等性能指标都明显优于传统的半导体器件。另外一方面它优越的性能在量子信息、深空通信、激光测距、传感、生物荧光光谱和芯片检测等众多领域得到了充分的验证。上海微系统所自2007年开始启动SNSPD相关技术研究，目前已掌握SNSPD材料、器件和系统集成的全部核心关键技术。并且在器件探测效率、暗计数、时间抖动等方面获得了系列国际领先的结果。通过和中科大等单位合作，成功将SNSPD应用到量子信息、卫星激光测距等领域。其中在量子通信方面的合作研究成果获得了2014年两院院士评选的十大科技进展。此外，上海微系统所已成立上海赋同科技有限公司，开展SNSPD器件和系统的产业化工作，并已经实现了国内外商业化销售，产生了很好的社会和经济效益。本报告主要介绍的内容包括以下几个方面：

1．量子信息技术对单光子探测技术需求；

2．SNSPD的基本原理；

3．从近红外到可见光波长的高探测效率SNSPD器件；

4．低暗计数SNSPD；

5．SNSPD应用。

In the beginning of this century, a new type of detector, superconducting nanowiresingle photon detector (SNSPD) joined the family of superconducting sensors anddetectors. Soon, it has been turning to be one of the most important players in this family since it surpasses the semiconducting single photon detectors (APD:avalanche photodiode and PMT: photo multiplier tube) with many advantages, such as high detection efficiency, low dark count rate, low timing jitter and highercounting speed. Now you may buy the commercial SNSPDs including the cryogenicsystem from a few start-up companies in the world. Many interesting applications and demonstrations of SNSPDs has been demonstrated in past a few years.

In this talk, I will introduce our work on SNSPD and its applications includingquantum information in SIMIT, CAS.

1．High detection efficiency SNSPD for the fiber communication wavelength of 1550 nm;

2．High detection efficiency SNSPD for wavelengths from the visible to near infrared;

3．How to reduce the dark countrate of SNSPD by the on-chip film narrow-bandpass filter;

4．How to realize SNSPD with high polarizationextinction ratio;

5．Demonstration of SNSPD applications.

报告人简介：上海微系统所“百人计划”研究员，博导。97、01和03年分别在南京大学获学士、硕士和博士学位。先后在日本东北大学、瑞典Chalmers技术大学、荷兰Twente大学和美国NIST和加州大学伯克利分校从事超导电子学研究。自07年起开展超导单光子探测（SNSPD）技术方面的研究，研发的SNSPD器件性能达到国际领先水平，应用于量子通信、卫星测距等应用，并实现了商业化销售。在Nature Photonics、PRL、PRX、OE等杂志发表论文80余篇，发明专利15项，获2010年江苏省科学技术奖一等奖。量子通信合作研究成果入选2014年两院院士评选的中国十大科技进展。担任《Superconductor Science andTechnology》、《Scientific Reports》编委、IEEE CSC SuperconductivityNews Forum副主编、IEC-TC90超导传感器组成员、International workshop ofsuperconducting sensors and detectors (IWSSD)国际委员会委员等学术兼职。

近期代表性成果：

1. 1、Q. C. Sun,et al, Quantum teleportation with independent sources and ** a network, Nature Photonics DOI: 10.1038/NPHOTON.2016.179

2. 2、J.-Y. Guan et al, "Observation of Quantum Fingerprinting Beating theClassical Limit," Phys Rev Lett 116, 240502 (2016).

3. 3、Y.-L. Tanget al, "Measurement-Device-Independent Quantum Key Distribution overUntrustful Metropolitan Network," Phys. Rev. X 6, 011024 (2016).

   4、H. Li et al,"Superconducting nanowire single photon detector at 532 nm anddemonstration in satellite laser ranging," OE 24, 3535-3542 (2016).

   5、H. Zhou etal, "Few-photon imaging at 1550 nm using a low-timing-jittersuperconducting nanowire single-photon detector," OE 23, 14603-14611 (2015).

4. 6、H. Li et al,"Large-sensitive-area superconducting nanowire single-photon detector at850 nm with high detection efficiency," OE, 17301-17308 (2015).

   7、Q. Guo etal, "Single photon detector with high polarization sensitivity,"Scientific reports 5, 9616 (2015).

5. 8、S. Chen, etal, "Dark counts of superconducting nanowire single-photon detector underillumination," OE 23, 10786-10793(2015).

   9、X. Y. Yanget al, "Superconducting nanowire single photon detector with on-chipbandpass filter," OE 22, 16267-16272(2014).

6. 10、Y.-L. Tang et al,"Measurement-Device-Independent Quantum Key Distribution over200 km," Phys Rev Lett 113, 190501 (2014).