Above-threshold ionization by few-cycle spatially inhomogeneous fields

被引:40
作者
Ciappina, M. F. [1 ]
Perez-Hernandez, J. A. [2 ]
Shaaran, T. [1 ]
Biegert, J. [1 ,3 ]
Quidant, R. [1 ,3 ]
Lewenstein, M. [1 ,3 ]
机构
[1] ICFO Inst Ciences Foton, Castelldefels 08860, Barcelona, Spain
[2] Ctr Laseres Pulsados CLPU, E-37008 Salamanca, Spain
[3] ICREA, Barcelona 08010, Spain
来源
PHYSICAL REVIEW A | 2012年 / 86卷 / 02期
关键词
ENHANCED ELECTRON ACCELERATION; ENVELOPE PHASE MEASUREMENT; SINGLE-SHOT; LASER; PHOTOIONIZATION; PHOTOEMISSION; GENERATION; TIME; ATOM;
D O I
10.1103/PhysRevA.86.023413
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We present theoretical studies of above-threshold ionization (ATI) produced by spatially inhomogeneous fields. This kind of field appears as a result of the illumination of plasmonic nanostructures and metal nanoparticles with a short laser pulse. We use the time-dependent Schrodinger equation in reduced dimensions to understand and characterize the ATI features in these fields. It is demonstrated that the inhomogeneity of the enhanced plasmonic field plays an important role in the ATI process and it produces appreciable modifications to the energy-resolved photoelectron spectra. In fact, our numerical simulations reveal that high-energy electrons can be generated. Specifically, using a linear approximation for the spatial dependence of the enhanced plasmonic field and with a near-infrared laser with intensities in the mid 10(14) W/cm(2) range, we show it is possible to drive electrons with energies in the near-keV regime. Furthermore, we study how the carrier envelope phase influences the emission of ATI photoelectrons for few-cycle pulses. Our quantum mechanical calculations are supported by their classical counterparts.
引用
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页数:6
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