He X, Htoon H, Doorn S K, Pernice W H P, Pyatkov F, Krupke R, Jeantet A, Chassagneux Y, Voisin C
Center for Integrated Nanotechnologies, Materials Physics and Applications Division, Los Alamos National Laboratory, Los Alamos, NM, USA.
Institute of Physics, University of Münster, Münster, Germany.
Nat Mater. 2018 Aug;17(8):663-670. doi: 10.1038/s41563-018-0109-2. Epub 2018 Jun 18.
Progress in quantum computing and quantum cryptography requires efficient, electrically triggered, single-photon sources at room temperature in the telecom wavelengths. It has been long known that semiconducting single-wall carbon nanotubes (SWCNTs) display strong excitonic binding and emit light over a broad range of wavelengths, but their use has been hampered by a low quantum yield and a high sensitivity to spectral diffusion and blinking. In this Perspective, we discuss recent advances in the mastering of SWCNT optical properties by chemistry, electrical contacting and resonator coupling towards advancing their use as quantum light sources. We describe the latest results in terms of single-photon purity, generation efficiency and indistinguishability. Finally, we consider the main fundamental challenges stemming from the unique properties of SWCNTs and the most promising roads for SWCNT-based chip integrated quantum photonic sources.
量子计算和量子密码学的进展需要在室温下、电信波长范围内实现高效的、电触发的单光子源。长期以来，人们一直知道半导体单壁碳纳米管（SWCNT）表现出很强的激子束缚，并能在很宽的波长范围内发光，但其应用受到量子产率低、对光谱扩散和闪烁高度敏感的阻碍。在这篇观点文章中，我们讨论了通过化学、电接触和谐振器耦合来掌握SWCNT光学特性以推动其作为量子光源应用方面的最新进展。我们从单光子纯度、产生效率和不可区分性方面描述了最新成果。最后，我们考虑了源于SWCNT独特性质的主要基本挑战以及基于SWCNT的芯片集成量子光子源最有前景的发展道路。
