Reflection of a few-cycle laser pulse on a metal nano-layer: generation of phase-dependent wake-fields
| dc.creator | Varro, Sandor | |
| dc.date | 2006-10-25 | |
| dc.date.accessioned | 2026-07-07T07:40:10Z | |
| dc.date.available | 2026-07-07T07:40:10Z | |
| dc.description | The reflection and transmission of a few-cycle femtosecond Ti:Sa laser pulse impinging on a metal nano-layer have been analysed. The thickness of the layer was assumed to be of order of 2-10 nm, and the metallic free electrons were represented by a surface current density distributed at the plane boundary of a dielectric substrate. The target studied this way can be imagined, for instance, as a semi-transparent mirror produced by evapotating a thin aluminum layer on the surface of a glass plate. The exact analytic solution has been given for the system of the coupled Maxwell-Lorentz equations decribing the dynamics of the surface current and the scattered radiation fields. It has been shown that in general a non-oscillatoty frozen-in wake-field appears following the main pulse with an exponential decay and with a definite sign of the electric field. The characteristic time of these wake-fields is inversely proportional with the square of the plasma frequency and with the thickness of the metal nano-layer, and can be larger than the original pulse duration. The magnitude of these wake-fields is proportional with the incoming field strength, and the definite sign of them governed by the cosine of the carrier-envelope phase difference of the incoming ultrashort laser pulse. As a consequence, when we let such a wake-field excite the electrons of a secondary target (say an electron beam, a metal plate or a gas jet), we obtain 100 percent modulation in the electron signal in a given direction, as we vary the carrier-envelope phase difference. This scheeme can perhaps serve as a basis for the construction of a robust linear carrier-envelope phase difference meter. | |
| dc.description | 8 pages, 2 figures | |
| dc.identifier | https://arxiv.org/abs/physics/0610229 | |
| dc.identifier | http://arxiv.org/abs/physics/0610229 | |
| dc.identifier | Laser Physics Letters, Vol. 4, pp 138-144 (2007) | |
| dc.identifier | doi:10.1002/lapl.200610095 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/121699 | |
| dc.subject | Plasma Physics | |
| dc.title | Reflection of a few-cycle laser pulse on a metal nano-layer: generation of phase-dependent wake-fields | |
| dc.type | text |