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

doi:10.16511/j.cnki.qhdxxb.2019.26.017

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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

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

作者信息 +

Miniaturized quantum key distribution transmitterbased on silicon PN junction emissions

HUANG Weishao, ZHANG Wei, HUANG Yidong

Author information +

文章历史 +

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。

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.

导出引用

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 https://doi.org/10.16511/j.cnki.qhdxxb.2019.26.017

HUANG Weishao, ZHANG Wei, HUANG Yidong. Miniaturized quantum key distribution transmitterbased on silicon PN junction emissions[J]. Journal of Tsinghua University(Science and Technology). 2019, 59(9): 744-749 https://doi.org/10.16511/j.cnki.qhdxxb.2019.26.017

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