Structural features of the self-action dynamics of ultrashort electromagnetic pulses

被引：24

作者：

Balakin, A. A. ^{[1
]}

Litvak, A. G. ^{[1
]}

Mironov, V. A. ^{[1
]}

Skobelev, S. A. ^{[1
]}

机构：

[1] Russian Acad Sci, Inst Appl Phys, Nizhnii Novgorod 603950, Russia

来源：

JOURNAL OF EXPERIMENTAL AND THEORETICAL PHYSICS | 2007年 / 104卷 / 03期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S106377610703003X

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Self-focusing dynamics of electromagnetic pulses of arbitrary duration is analyzed numerically and analytically. The wave-field evolution is considered by the wave equation in the reflectionless approximation under quite general assumptions about the dispersion of the medium. Methods for qualitative investigation of the self-focusing dynamics of quasimonochromatic radiation are generalized to the case of wave packets with the length of a few oscillation periods. In particular, sufficient conditions for collapse and many other integral relations are obtained by the momentum method. A self-similar-type transformation is used to show that new structural features are primarily associated with the nonlinear dispersion of the medium (with the dependence of the group velocity of a wave packet on its amplitude). Numerical analysis confirms that the self-focusing of radiation is preceded by an increase in the steepness of the longitudinal profile.

引用

页码：363 / 378

页数：16

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