Dynamics of electron-emission currents in plasmonic gaps induced by strong fields,Faraday Discussions

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Dynamics of electron-emission currents in plasmonic gaps induced by strong fields
Faraday Discussions ( IF 3.3 ) Pub Date : 2018-11-15 , DOI: 10.1039/c8fd00158h
Garikoitz Aguirregabiria _{1,

2,

2,

3,

4} , Dana-Codruta Marinica _{5,

6,

7,

8} , Markus Ludwig _{9,

10,

11,

12,

13} , Daniele Brida _{9,

10,

11,

12,

13} , Alfred Leitenstorfer _{9,

10,

11,

12,

13} , Javier Aizpurua _{1,

2,

2,

3,

4} , Andrey G. Borisov _{5,

6,

7,

8}

Affiliation

The dynamics of ultrafast electron currents triggered by femtosecond laser pulse irradiation of narrow gaps in a plasmonic dimer is studied using quantum mechanical Time-Dependent Density Functional Theory (TDDFT). The electrons are injected into the gap due to the optical field emission from the surfaces of the metal nanoparticles across the junction. Further evolution of the electron currents in the gap is governed by the locally enhanced electric fields. The combination of TDDFT and classical modelling of the electron trajectories allows us to study the quiver motion of the electrons in the gap region as a function of the Carrier Envelope Phase (CEP) of the incident pulse. In particular, we demonstrate the role of the quiver motion in establishing the CEP-sensitive net electric transport between nanoparticles.

中文翻译：

强场在等离子体间隙中电子发射电流的动力学

利用量子力学时变密度泛函理论（TDDFT）研究了飞秒激光脉冲辐照等离激元二聚体中狭窄间隙所触发的超快电子电流的动力学。由于穿过结的金属纳米颗粒表面的光场发射，电子被注入到间隙中。间隙中电子电流的进一步发展由局部增强的电场控制。TDDFT与电子轨迹的经典模型相结合，使我们能够研究作为入射脉冲的载流子包络相位（CEP）的函数的间隙区域中的电子颤动。特别是，我们证明了颤动运动在建立纳米粒子之间的CEP敏感净电传输中的作用。

更新日期：2019-05-29

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