应电子物理与器件教育部重点实验室的邀请，中国科学院院士、南京大学超导电子学研究所所长吴培亨教授将来我校访问，并为我校师生做一次学术报告，欢迎广大师生参加！

报告题目：Single Photon Detector Based on Superconducting Nanowires

报告时间：2011年3月4日(星期五) 下午14:30-16:00

报告地点：主楼十六层第二会议室

报告摘要

For both practical applications and fundamental researches, a device capable of detecting single photons at specified frequency is extremely desirable. The major requirements for such a device are its quantum efficiency, dark count rate, response speed, and jitter. Although there are some single photon detectors available, the one based on superconducting nanowire is very attractive particularly because of its low dark count rate.

In this talk we shall discuss the fabrication and characterization of NbN thin films on MgO and Si substrates. Such films are patterened into various devices with widths ranging from 200 nm to 50 nm to make single photon detectors. The maximum system efficiencies are up to 30% (660 nm) and 4.2% (1550 nm), while at a dark count rate of 10 c/s, the detection efficiencies are 20% (660 nm) and 3% (1550 nm). The resposne and jitter of our devices will also be discussed.

吴培亨院士简介

吴培亨，著名超导电子学专家。中国科学院院士、南京大学电子科学与工程学院教授、超导电子学研究所所长，兼中国科学院信息技术科学部副主任、中国电子学会超导电子学分会主任。曾任南京大学研究生院院长。吴培亨院士长期从事超导电子学的研究，尤长于超导电子器件的高频（微波到太赫兹波段）应用，在探索有关物理过程的基本规律、发展新型超导电子器件、推动超导电子器件的实际应用等方面做出了具有重要学术影响的贡献。吴院士近年的研究兴趣集中在太赫兹技术及其应用、超导量子计算等方面。