Terahertz Radiation by Subpicosecond Magnetization Modulation in the Ferrimagnet LiFe5O8

被引：19

作者：

Kinoshita, Yuto ^{[1
]}

Kida, Noriaki ^{[1
]}

Sotome, Masato ^{[1
]}

Miyamoto, Tatsuya ^{[1
]}

Iguchi, Yusuke ^{[2
]}

Onose, Yoshinori ^{[2
]}

Okamoto, Hiroshi ^{[1
]}

机构：

[1] Univ Tokyo, Dept Adv Mat Sci, 5-1-5 Kashiwa No ha, Chiba 2778561, Japan

[2] Univ Tokyo, Dept Basic Sci, 3-8-1 Komaba, Tokyo 1538902, Japan

来源：

ACS PHOTONICS | 2016年 / 3卷 / 07期

基金：

日本学术振兴会;

关键词：

ferrimagnets; terahertz radiation imaging; magnetic domains; magnetization modulation; FEMTOSECOND LASER-PULSES; LITHIUM FERRITE; EMISSION; FILMS; MAGNETISM; NICKEL;

D O I：

10.1021/acsphotonics.6b00272

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

We report the terahertz radiation in the polar and ferrimagnetic insulating oxide LiFe5O8 upon irradiation of a femtosecond laser pulse at room temperature. By the resonant optical excitation of an originally spin-forbidden d-d transition in Fe3+ ions, we observed the emission of terahertz waves, which is attributable to the magnetic-dipole radiation originating from the light-induced subpicosecond magnetization modulation. By mapping out the emission of the terahertz waves, we successfully visualized the vector images of in-plane magnetic domains in magnetic fields. The terahertzradiation imaging presented here is useful as a new tool to observe ferromagnetic or ferrimagnetic domains.

引用

页码：1170 / 1175

页数：6

共 37 条

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