Quantized nano-objects offer a myriad of exciting possibilities for manipulating electrons and light that impact photonics, nanoelectronics, and quantum information. In this context, ultrashort laser pulses combined with nanotips and field emission have permitted renewing nano-characterization and control electron dynamics with unprecedented space and time resolution reaching femtosecond and even attosecond regimes. A crucial missing step in these experiments is that no signature of quantized energy levels has yet been observed. We combine in situ nanostructuration of nanotips and ultrashort laser pulse excitation to induce multiphoton excitation and electron emission from a single quantized nano-object attached at the apex of a metal nanotip. Femtosecond induced tunneling through well-defined localized confinement states that are tunable in energy is demonstrated. This paves the way for the development of ultrafast manipulation of electron emission from isolated nano-objects including stereographically fixed individual molecules and high brightness, ultrafast, coherent single electron sources for quantum optics experiments.

中文翻译：

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飞秒激光诱导的共振隧穿在连接到Nanotip的单个量子点中

量化的纳米物体为操纵影响光子学，纳米电子学和量子信息的电子和光提供了无数激动人心的可能性。在这种情况下，结合纳米尖端和场发射的超短激光脉冲已经可以更新纳米特征，并以前所未有的时空分辨率达到飞秒甚至十亿分之一秒的状态来控制电子动力学。这些实验中缺少的关键步骤是尚未观察到量化能级的信号。我们就地结合纳米尖端的纳米结构和超短激光脉冲激发，以从附着在金属纳米尖端顶点的单个量化纳米物体诱发多光子激发和电子发射。飞秒诱导的隧道穿过能量可调谐的定义明确的局域约束状态。这为开发从孤立的纳米物体，包括立体固定的单个分子和用于量子光学实验的高亮度，超快速，相干单个电子源的超快操纵电子发射铺平了道路。