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arXiv 1403.7002physics.optics
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来自单个NV中心的荧光的快速光学调制

Fast optical modulation of the fluorescence from a single NV centre

Michael Geiselmann, Renaud Marty, F. Javier García de Abajo, Romain Quidant

发表信息：
Nature Physics 9, 785-789 (2013)
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摘要：

光学晶体管--电子晶体管的光子对应物--正准备成为光学信号处理发展的核心成分。使用光子而不是电子的动机不仅来自它们更快的动力学，而且来自它们更低的串扰和较小的环境退相干，这使得高度集成和实现量子操作成为可能。单分子晶体管最近已在低温下得到证实。在这里，我们证明了一个单一的NV中心在室温下可以作为一个光开关下的非共振CW照明。我们在绿色激光驱动的荧光信号中显示了超过80%的光学调制和超过100 ns的时间响应，我们通过独立的近红外（NIR）选通激光器进行控制。我们的研究表明，近红外激光触发的快速衰减通道的NV介导的促进的激发态的暗带。这一简单的概念为实现纳米级光开关器件开辟了新的途径。

英文摘要：

The much sought after optical transistor --the photonic counterpart of the electronic transistor-- is poised to become a central ingredient in the development of optical signal processing. The motivation for using photons rather than electrons not only comes from their faster dynamics but also from their lower crosstalk and minor environmental decoherence, which enable a high degree of integration and the realization of quantum operations. A single-molecule transistor has been recently demonstrated at cryogenic temperatures. Here, we demonstrate that a single NV centre at room temperature can operate as an optical switch under non-resonant CW illumination. We show optical modulation of more than 80% and time response faster than 100 ns in the green-laser-driven fluorescence signal, which we control through an independent near-infrared (NIR) gating laser. Our study indicates that the NIR laser triggers a fast-decay channel of the NV mediated by promotion of the excited state to a dark band. This simple concept opens a new approach towards the implementation of nanoscale optical switching devices.

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