Quantum emission from hexagonal boron nitride monolayers
Quantum emission from hexagonal boron nitride monolayers
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DOI：
10.1038/nnano.2015.242
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发表时间：
2016-01-01
影响因子：
38.3
通讯作者：
Aharonovich, Igor
中科院分区：
文献类型：
--
作者：
Tran, Toan Trong;Bray, Kerem;Aharonovich, Igor
固体中的人工原子系统被广泛认为是多种量子技术（包括量子通信、计算和计量学）的主要物理系统。然而，到目前为止，室温量子发射器仅在宽带隙半导体（如金刚石和碳化硅）、纳米晶量子点以及最近在碳纳米管中被观测到。二维材料的单光子发射已有报道，但仅在低温下。在此，我们展示了二维六方氮化硼中色心在室温下的偏振和超高亮度单光子发射。密度泛函理论计算表明，与空位相关的缺陷可能是发射源。我们的结果展示了范德华晶体在大规模纳米光子学和量子信息处理方面前所未有的潜力。
Artificial atomic systems in solids are widely considered the leading physical system for a variety of quantum technologies, including quantum communications, computing and metrology(1,2). To date, however, room-temperature quantum emitters have only been observed in wide-bandgap semiconductors such as diamond(3) and silicon carbide(4), nanocrystal quantum dots(5-7), and most recently in carbon nanotubes(8). Single-photon emission from two-dimensional materials has been reported(9-12), but only at cryogenic temperatures. Here, we demonstrate room-temperature, polarized and ultrabright single-photon emission from a colour centre in two-dimensional hexagonal boron nitride. Density functional theory calculations indicate that vacancy-related defects are a probable source of the emission. Our results demonstrate the unprecedented potential of van der Waals crystals for large-scale nanophotonics and quantum information processing.