【摘 要】
：
Increasing the detection efficiency (DE) is a hot issue in the development of the superconducting nanowire single photon detector (SNSPD).In this work,a cavity-
【机 构】
：
Tsinghua National Laboratory for Information Science and Technology, Department of Microelectronics
论文部分内容阅读
Increasing the detection efficiency (DE) is a hot issue in the development of the superconducting nanowire single photon detector (SNSPD).In this work,a cavity-integrated structure coupled to the SNSPD is used to enhance the light absorption of nanowire.Ultra-thin Nb films are successfully prepared by magnetron sputtering,which are used to fabricate Nb/Al SNSPD with the curve of 100nm and the square area of 4 × 4 μm2 by sputtering and the lift-off method.To characterize the optical and electrical performance of the cavity-integrated SNSPD,a reliable cryogenic research system is built up based on a He3 system.To satisfy the need of light coupling,a packaging structure with collimator is conducted.Both DE and the dark count rates increase with Ib.It is also found that the DE of SNSPD with cavities can be up to 0.17％ at the temperature of 0.7K under the infrared light of 1550nm,which is obviously higher than that of the SNSPD directly fabricated upon silicon without any cavity structure.
其他文献
民办高职院校规模逐年壮大和生源逐年减少的背景下,院校要通过加强专业建设来寻求生存和发展.文章以上海东海职业技术学院会计专业为例,通过2012届毕业生就业情况分析,提出应
The method of using dielectrophoresis (DEP) to assemble graphene between micro-electrodes has been proven to be simple and efficient.We present an optimization
One of the most challenging tasks in the laser-driven Hugoniot experiment is how to increase the reproducibility and precision of the experimental data to meet
Computed tomography has been proven to be useful for non-destructive inspection of structures and materials.We build a three-dimensional imaging system with the
We demonstrate the hybridization of the plasmonic modes in directly coupled whispering gallery cavities fabricated on silver films and present the mode pattes a
职业学校教师必须进一步提高教育认识,增强教育理念,树立起“父”“母”观,站在学生“父母”的角度上来对学生进行更加感性与有效的教学,这对提高学生学习质量来说具有非常重
洋葱是我国重要的创汇蔬菜,但关于洋葱施肥和营养吸收、分配方面的研究较少,生产上存在着盲目施肥的现象,既增加了成本,也影响了洋葱的产量和品质,降低了洋葱的生产效益。为
想出好点子漫画界对漫画创作有一句流行的话叫“三分画,七分想”,可见想——构思,在漫画创作中占有重要地位。构思,就是在题材、主题确定后,寻求艺术表现手段的过程。构思也