Femtosecond Laser Induced Resonant Tunneling in an Individual Quantum Dot Attached to a Nanotip
Femtosecond Laser Induced Resonant Tunneling in an Individual Quantum Dot Attached to a Nanotip
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DOI：
10.1021/acsphotonics.0c01490
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发表时间：
2021-01-27
期刊：
影响因子：
7
通讯作者：
Ayari, Anthony
中科院分区：
文献类型：
--
作者：
Duchet, Maxime;Perisanu, Sorin;Ayari, Anthony
量子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令人兴奋的可能性。在这种背景下，超短激光脉冲与纳米针尖和场发射相结合，使得纳米表征和控制电子动力学具有了前所未有的空间和时间分辨率，达到了飞秒甚至阿秒范围。这些实验中一个关键的缺失步骤是，还没有观察到量子化能级的特征。我们将纳米尖端的原位纳米化和超短激光脉冲激发相结合，从附着在金属纳米尖端的单个量子化纳米物体中诱导多光子激发和电子发射。证明了飞秒诱导的隧道通过定义明确的局域禁闭状态是能量可调的。这为超快操纵孤立纳米物体的电子发射的发展铺平了道路，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、相干单电子源。
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.