Optically generated terahertz pulses with strong quasistatic precursors

被引：32

作者：

Bakunov, M. I. ^{[1
]}

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

Tsarev, M. V. ^{[1
]}

机构：

[1] Univ Nizhny Novgorod, Nizhnii Novgorod, Russia

来源：

PHYSICAL REVIEW A | 2017年 / 95卷 / 06期

关键词：

FREQUENCY UP-CONVERSION; ELECTROMAGNETIC-RADIATION; ELECTRON ACCELERATION; IONIZATION FRONT; THZ-PULSE; RECTIFICATION; DRIVEN; ZNTE; ABSORPTION; CRYSTAL;

D O I：

10.1103/PhysRevA.95.063817

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We found theoretically that optical rectification of an ultrashort laser pulse in an electro-optic crystal can produce a terahertz pulse with a quasistatic electromagnetic precursor propagating ahead of the pulse. The strengths of the electric and magnetic fields in the precursor can be comparable to those in the main terahertz pulse. This effect occurs if the pump optical pulse is intense enough to produce two-photon or multiphoton ionization in the crystal. The precursor is generated by the current of the optically created carriers, which are accelerated by the electric field of the terahertz pulse. The optically generated strong quasistatic precursors can be used for particle acceleration, control of magnetic materials, and in streaking techniques.

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页数：5

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