dorsal/arxiv
View SchemaLinear and nonlinear absolute phase effects in interactions of ultrashort laser pulses with a metal nano-layer or with a plasma layer
| Authors | Sandor Varro |
|---|---|
| Categories | |
| ArXiv ID | physics/0610266 |
| URL | https://arxiv.org/abs/physics/0610266 |
| DOI | 10.1017/S0263034607000250 |
| Journal | Laser and Particle Beams (2007), Vol. 25, No. 3, 379-390 |
Abstract
It has been shown that in the scattered radiation, generated by an ultrashort laser pulse impinging on a metal nano-layer, non-oscillatory wake-fields appear with a definite sign. The magnitude of these wake-fields is proportional with the incoming field strength, and a sign of them is governed by the cosine of the carrier-envelope phase difference of the incoming pulse. At relativistic laser intensities the target is considered as a plasma layer in vacuum, produced from a thin foil by a pre-pulse, which is followed by the main high-intensity laser pulse. The nonlinearities stemming from the relativistic kinematics of the surface current density (representing the plasma electrons) lead to the appearance of higher-harmonics in the scattered spectra. In general, the harmonic peaks are down-shited due to the presence of an intensity-dependent factor. Certain regions of these spectra are very sensitive to the variation of the carrier-envelope phase difference. The spectra has a long tail where the heigths of the peaks vary practically within one order of magnitude forming a quasi-continuum. By Fourier synthetising the components from this plateau region attosecond pulses have been obtained.
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"abstract": "It has been shown that in the scattered radiation, generated by an ultrashort\nlaser pulse impinging on a metal nano-layer, non-oscillatory wake-fields appear\nwith a definite sign. The magnitude of these wake-fields is proportional with\nthe incoming field strength, and a sign of them is governed by the cosine of\nthe carrier-envelope phase difference of the incoming pulse. At relativistic\nlaser intensities the target is considered as a plasma layer in vacuum,\nproduced from a thin foil by a pre-pulse, which is followed by the main\nhigh-intensity laser pulse. The nonlinearities stemming from the relativistic\nkinematics of the surface current density (representing the plasma electrons)\nlead to the appearance of higher-harmonics in the scattered spectra. In\ngeneral, the harmonic peaks are down-shited due to the presence of an\nintensity-dependent factor. Certain regions of these spectra are very sensitive\nto the variation of the carrier-envelope phase difference. The spectra has a\nlong tail where the heigths of the peaks vary practically within one order of\nmagnitude forming a quasi-continuum. By Fourier synthetising the components\nfrom this plateau region attosecond pulses have been obtained.",
"arxiv_id": "physics/0610266",
"authors": [
"Sandor Varro"
],
"categories": [
"physics.plasm-ph"
],
"doi": "10.1017/S0263034607000250",
"journal_ref": "Laser and Particle Beams (2007), Vol. 25, No. 3, 379-390",
"title": "Linear and nonlinear absolute phase effects in interactions of ultrashort laser pulses with a metal nano-layer or with a plasma layer",
"url": "https://arxiv.org/abs/physics/0610266"
},
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