Terahertz Cherenkov radiation from ultrafast magnetization in terbium gallium garnet

被引：11

作者：

Gorelov, S. D. ^{[1
]}

Mashkovich, E. A. ^{[1
]}

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

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

机构：

[1] Univ Nizhny Novgorod, Nizhnii Novgorod 603950, Russia

来源：

PHYSICAL REVIEW B | 2013年 / 88卷 / 22期

关键词：

PULSES; MANIPULATION;

D O I：

10.1103/PhysRevB.88.220411

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

We report an experimental observation of terahertz Cherenkov radiation from a moving magnetic moment produced in terbium gallium garnet by a circularly polarized femtosecond laser pulse via the inverse Faraday effect. Contrary to some existing theoretical predictions, the polarity of the observed radiation unambiguously demonstrates the paramagnetic, rather than diamagnetic, nature of the ultrafast inverse Faraday effect. From measurements of the radiation field, the Verdet constant in the subpicosecond regime is similar to 3-10 times smaller than its table quasistatic value.

引用

页数：5

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