Time-domain calculation of forerunners in Drude dispersive media without collisions

被引：2

作者：

Pavlenko, Ivan, V ^{[1
]}

Girka, Igor O. ^{[1
]}

Trush, Oleksandr, V ^{[1
]}

Hnatiuk, Sofiia, V ^{[1
]}

机构：

[1] Kharkov Natl Univ, Dept Phys & Technol, Svobody Sq 4, UA-61022 Kharkiv, Ukraine

来源：

PHYSICAL REVIEW A | 2021年 / 104卷 / 01期

关键词：

SOMMERFELD-BRILLOUIN THEORY; PULSE DYNAMICS; PROPAGATION; PRECURSORS; ABSORPTION; WAVES; LIGHT;

D O I：

10.1103/PhysRevA.104.013518

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The forerunners of the step-modulated sine pulse propagating in Drude dispersive media are calculated in the time domain. Two such problems are solved analytically. In the first problem, the plane source of the electric field is inside the medium. And the second problem considers the normal incidence of a linearly polarized wave from a vacuum upon a half-space medium. The obtained forerunners are identified as Sommerfeld precursors but the frequency of the oscillations and their amplitudes are closer to the exact solutions than the predictions of canonical Sommerfeld precursor. Moreover, the obtained periodicity of the forerunners is in perfect agreement with the exact solution. The developed analytics is an important contribution to the time-domain theory of the forerunners. The obtained data will be helpful for an experimental study of the forerunners and for the comparison with the forerunners in other dispersive media or with other waveforms of the incident pulse.

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页数：9

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