A highly efficient single-photon source based on a quantum dot in a photonic nanowire
A highly efficient single-photon source based on a quantum dot in a photonic nanowire
复制标题
DOI：
10.1038/nphoton.2009.287x
复制
发表时间：
2010-03-01
期刊：
影响因子：
35
通讯作者：
Gerard, Jean-Michel
中科院分区：
文献类型：
--
作者：
Claudon, Julien;Bleuse, Joel;Gerard, Jean-Michel
在量子通信、光量子信息处理和计量学的背景下，开发高效的单光子固态源是一项重大挑战(1)。这样的光源必须能够实现稳定的单光子发射器，如钻石(2-4)或半导体量子点(5-7)中的色心。长期以来，实现高提取效率一直被认为是一个主要问题，经典解(8)和腔量子电动力学效应(1，9-12)都得到了应用。我们采用了一种不同的方法，将InAs量子点嵌入到具有精心剪裁的末端的GaAs光子纳米线中(13)。在光泵浦下，结合纯单光子发射，我们得到了0.72的记录源效率。这种非共振方法还提供了宽带自发辐射控制，从而为基于光谱宽发射体的单光子源、波长可调谐源或高效纠缠光子对源的发展提供了新的机会。
The development of efficient solid-state sources of single photons is a major challenge in the context of quantum communication, optical quantum information processing and metrology(1). Such a source must enable the implementation of a stable, single-photon emitter, like a colour centre in diamond(2-4) or a semiconductor quantum dot(5-7). Achieving a high extraction efficiency has long been recognized as a major issue, and both classical solutions(8) and cavity quantum electrodynamics effects have been applied(1,9-12). We adopt a different approach, based on an InAs quantum dot embedded in a GaAs photonic nanowire with carefully tailored ends(13). Under optical pumping, we demonstrate a record source efficiency of 0.72, combined with pure single-photon emission. This non-resonant approach also provides broadband spontaneous emission control, thus offering appealing novel opportunities for the development of single-photon sources based on spectrally broad emitters, wavelength-tunable sources or efficient sources of entangled photon pairs.