公开(公告)号：US20130143744A1

公开(公告)日：2013-06-06

申请号：US13646439

申请日：2012-10-05

Applicant: Massachusetts Institue of Technology

Inventor： Francesco Marsili ,  Karl K. Berggren

IPC: H01L31/107 ,  G06F17/50 ,  H01L39/02

CPC classification number: H01L31/107 ,  G01J1/4228 ,  G01J5/20 ,  G01J2001/442 ,  G01J2001/4446 ,  G01J2005/208 ,  G06F17/5072 ,  H01L39/02 ,  H01L39/10

Abstract: A superconducting nanowire avalanche photodetector (SNAP) with improved high-speed performance. An inductive element may be coupled in series with at least two parallel-coupled nanowires. The nanowires may number 5 or fewer, and may be superconducting and responsive to even a single photon. The series inductor may ensure current diverted from a photon-absorbing nanowire propagates to other nanowires and become amplified. The series inductance may be less than 10 times the nominal inductance per nanowire, and may also be larger than a minimum inductance to avoid spurious outputs in response to a photon absorption. The series inductance may be configured to achieve a desired tradeoff between SNAP reset time and spurious outputs. For example, the series inductance may be configured achieve minimum reset time or maximum bias margin, subject to user-defined constraints. By appropriately configuring the series inductance, a systematic method of designing improved SNAPs may be provided.

Abstract translation: 超导纳米线雪崩光电探测器（SNAP）具有改进的高速性能。 电感元件可以与至少两个平行耦合的纳米线串联耦合。 纳米线可以是5或更少，并且可能是超导的并且甚至对单个光子有反应。 串联电感器可以确保从光子吸收纳米线转移的电流传播到其他纳米线并​​变得放大。 串联电感可以小于每纳米线的标称电感的10倍，并且还可以大于最小电感以避免响应于光子吸收的杂散输出。 串联电感可以被配置为实现SNAP复位时间和杂散输出之间的期望权衡。 例如，串联电感可以被配置为实现最小复位时间或最大偏置裕度，受用户定义的限制。 通过适当地配置串联电感，可以提供设计改进的SNAP的系统方法。