飞秒Laser诱导纳米针尖上单个量子点的共振隧穿
Femtosecond Laser Induced Resonant Tunneling in an Individual Quantum Dot Attached to a Nanotip
摘要：
量子化的奈米物体提供了无数令人兴奋的可能性，可以操控影响光子学、奈米电子学和量子信息的电子和光。在这种情况下，超短激光脉冲与纳米尖端和场致发射相结合，允许更新纳米表征和控制电子动力学，具有前所未有的空间和时间分辨率，达到飞秒甚至阿秒制度。在这些实验中，一个关键的缺失是尚未观察到量子化能级的特征。我们结合原位纳米结构化的纳米尖和超短激光脉冲激发诱导多光子激发和电子发射从一个单一的量子化的纳米物体附着在一个金属纳米尖的顶点。飞秒诱导隧穿通过定义良好的本地化的限制状态，是可调的能量被证明。这铺平了道路的发展超快操纵电子发射从孤立的纳米物体，包括立体固定的单个分子和高亮度，超快，相干单电子源的量子光学实验。
英文摘要：
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.
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