Electron rescattering at metal nanotips induced by ultrashort laser pulses

28th International Conference on Photonic, Electronic and Atomic Collisions

Wachter, G.^1 ; Lemell, C.^1 ; Burgdörfer, J.^1

Institute for Theoretical Physics, Vienna University of Technology, Wiedner Hauptstr. 8-10, Vienna

A-1040, Austria^1

关键词: Emitted electron;    Femtosecond time scale;    Few-cycle laser pulse;    Laser wavelength;    Local field enhancement;    Nanoscale metals;    Quantum dynamics;    Time dependent density functional theory;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/1/012005/pdf
DOI  :  10.1088/1742-6596/488/1/012005

来源: IOP

【 摘 要 】

We theoretically investigate the interaction of moderate intensity near-infrared few cycle laser pulses with nano-scale metal tips. Local field enhancement in a nanometric region around the tip apex triggers coherent electron emission on the nanometer length and femtosecond time scale. The quantum dynamics at the surface are simulated with time-dependent density functional theory (TDDFT) and interpreted based on the simple man's model. We investigate the dependence of the emitted electron spectra on the laser wavelength.