Field propagation-induced directionality of carrier-envelope phase-controlled photoemission from nanospheres.
Field propagation-induced directionality of carrier-envelope phase-controlled photoemission from nanospheres.
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DOI：
10.1038/ncomms8944
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发表时间：
2015-08-12
影响因子：
16.6
通讯作者：
Fennel T
中科院分区：
文献类型：
--
作者：
Süßmann F;Seiffert L;Zherebtsov S;Mondes V;Stierle J;Arbeiter M;Plenge J;Rupp P;Peltz C;Kessel A;Trushin SA;Ahn B;Kim D;Graf C;Rühl E;Kling MF;Fennel T
非共振激光激发纳米结构的近场使超短光场的强局部化成为可能，并为从根本上改变和控制电子强场过程开辟了新的途径。利用时空可调谐近场来操纵子循环电子动力学可以实现超快光电器件和阿秒电子和光子脉冲的产生中的前所未有的控制。在这里，我们利用无支撑的亚波长电介质纳米球产生近场与可调结构，并通过光电子成像研究所产生的强场动力学。我们证明了场传播引起的可调谐性的发射方向的快速电子的制度，其中非线性电荷相互作用的影响成为主导的加速过程。我们的分析支持的时间的arrhesion过程仍然是可控的阿秒分辨率的载波包络相位，表明有可能扩大近场介导的控制远远进入高场现象的领域。 激光在纳米结构的光学近场中的局部增强使得能够操纵超快电子运动。在这里，作者采用纳米球中的场传播来获得近场诱导强场光电发射的方向可调谐性和阿秒控制。
Near-fields of non-resonantly laser-excited nanostructures enable strong localization of ultrashort light fields and have opened novel routes to fundamentally modify and control electronic strong-field processes. Harnessing spatiotemporally tunable near-fields for the steering of sub-cycle electron dynamics may enable ultrafast optoelectronic devices and unprecedented control in the generation of attosecond electron and photon pulses. Here we utilize unsupported sub-wavelength dielectric nanospheres to generate near-fields with adjustable structure and study the resulting strong-field dynamics via photoelectron imaging. We demonstrate field propagation-induced tunability of the emission direction of fast recollision electrons up to a regime, where nonlinear charge interaction effects become dominant in the acceleration process. Our analysis supports that the timing of the recollision process remains controllable with attosecond resolution by the carrier-envelope phase, indicating the possibility to expand near-field-mediated control far into the realm of high-field phenomena. The localized enhancement of laser light in optical near-fields of nanostructures enables the steering of ultrafast electronic motion. Here, the authors employ field propagation in nanospheres to obtain directional tunability and attosecond control of near-field-induced strong-field photoemission.