用于在电信O波段发射的明亮电驱动量子点单光子源的设计优化。

Design optimization for bright electrically-driven quantum dot single-photon sources emitting in telecom O-band.

作者信息

Blokhin S A, Bobrov M A, Maleev N A, Donges J N, Bremer L, Blokhin A A, Vasil'ev A P, Kuzmenkov A G, Kolodeznyi E S, Shchukin V A, Ledentsov N N, Reitzenstein S, Ustinov V M

出版信息

Opt Express. 2021 Mar 1;29(5):6582-6598. doi: 10.1364/OE.415979.

DOI:10.1364/OE.415979

PMID:33726176

Abstract

A combination of advanced light engineering concepts enables a substantial improvement in photon extraction efficiency of micro-cavity-based single-photon sources in the telecom O-band at ∼1.3 µm. We employ a broadband bottom distributed Bragg reflector (DBR) and a top DBR formed in a dielectric micropillar with an additional circular Bragg grating in the lateral plane. This device design includes a doped layer in pin-configuration to allow for electric carrier injection. It provides broadband (∼8-10 nm) emission enhancement with an overall photon-extraction efficiency of ∼83% into the upper hemisphere and photon-extraction efficiency of ∼79% within numerical aperture NA=0.7. The efficiency of photon coupling to a single-mode fiber reaches 11% for SMF28 fiber (with NA=0.12), exceeds 22% for 980HP fiber (with NA=0.2) and reaches ∼40% for HNA fiber (with NA=0.42) as demonstrated by 3D finite-difference time-domain modeling.

摘要

先进的光工程概念相结合，能够显著提高基于微腔的单光子源在电信O波段约1.3 µm波长处的光子提取效率。我们采用宽带底部分布式布拉格反射器（DBR）和顶部DBR，其形成于介电微柱中，并在侧面具有额外的圆形布拉格光栅。该器件设计包括采用pin结构的掺杂层，以允许电载流子注入。它提供宽带（约8 - 10 nm）发射增强，进入上半球的整体光子提取效率约为83%，在数值孔径NA = 0.7范围内的光子提取效率约为79%。通过三维时域有限差分建模表明，对于SMF28光纤（NA = 0.12），光子耦合到单模光纤的效率达到11%，对于980HP光纤（NA = 0.2）超过22%，对于HNA光纤（NA = 0.42）达到约40%。