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清华大学学报(自然科学版)  2019, Vol. 59 Issue (9): 744-749    DOI: 10.16511/j.cnki.qhdxxb.2019.26.017
  电子工程 本期目录 | 过刊浏览 | 高级检索 |
基于硅PN结发光的量子密钥分发发射单元器件
黄卫绍, 张巍, 黄翊东
清华大学 电子工程系, 北京 100084
Miniaturized quantum key distribution transmitterbased on silicon PN junction emissions
HUANG Weishao, ZHANG Wei, HUANG Yidong
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China
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摘要 该文面向便携设备与主机间实现短距离量子密钥分发(quantum key distribution,QKD)的应用场景,基于BB84协议提出一种小型化QKD发射单元器件。该器件采用硅PN结反向击穿作为光源发光机制,配合金属线栅偏振器实现4种不同线偏振态光子的发射。利用光阑和凸透镜实现发射光子的准直输出,并消除不同偏振光子在发射位置上的差别。数值计算结果表明:经过参数优化该器件可以实现大于20 dB的偏振消光比,原始密钥生成率可以达到3 kb/s。该器件结构高度可以控制在5 mm之内,便于在便携设备中应用。
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黄卫绍
张巍
黄翊东
关键词 量子密钥分发硅PN结发光线栅偏振器空间不可区分性    
Abstract:This paper describes a miniaturized quantum key distribution (QKD) transmitter for the BB84 protocol for short-range QKD applications between portable devices and hosts. The transmitter uses silicon PN junctions to generate photons and wire-grid polarizers for the polarization encoding. It also uses a convex lens and an aperture for collimation as well as to eliminate the photon spatial information. Simulations indicate that the transmitter can support a raw key generation rate of 3 kb/s and the polarization extinction ratio of the generated photons in each polarization state can reach 20 dB. The transmitter height can be as small as 5 mm, so the device can be integrated into portable devices such as mobile phones.
Key wordsquantum key distribution    silicon PN junction emissions    wire-grid polarizer    spatial indistinguishability
收稿日期: 2019-01-07      出版日期: 2019-08-27
基金资助:国家重点研发计划项目(2017YFA0303704);国家自然科学基金资助项目(61575102,61671438,61875101,61621064);北京市自然科学基金资助项目(Z180012);北京量子信息科学研究院项目(Y18G26)
通讯作者: 张巍,副教授,E-mail:zwei@tsinghua.edu.cn     E-mail: zwei@tsinghua.edu.cn
引用本文:   
黄卫绍, 张巍, 黄翊东. 基于硅PN结发光的量子密钥分发发射单元器件[J]. 清华大学学报(自然科学版), 2019, 59(9): 744-749.
HUANG Weishao, ZHANG Wei, HUANG Yidong. Miniaturized quantum key distribution transmitterbased on silicon PN junction emissions. Journal of Tsinghua University(Science and Technology), 2019, 59(9): 744-749.
链接本文:  
http://jst.tsinghuajournals.com/CN/10.16511/j.cnki.qhdxxb.2019.26.017  或          http://jst.tsinghuajournals.com/CN/Y2019/V59/I9/744
  图1 (网络版彩图)QKD发射单元的器件结构设计
  图2 (网络版彩图)铝线栅起偏器的性能仿真
  图3 空间光学结构模型与消除信号空间信息的设计
  表1 器件主要设计参数
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