Tunable near- to mid-infrared pump terahertz probe spectroscopy in reflection geometry

被引：3

作者：

Zhang, S. J. ^{[1
]}

Wang, Z. X. ^{[1
]}

Dong, T. ^{[1
]}

Wang, N. L. ^{[1
,2
]}

机构：

[1] Peking Univ, Sch Phys, Int Ctr Quantum Mat, Beijing 100871, Peoples R China

[2] Collaborat Innovat Ctr Quantum Matter, Beijing 100871, Peoples R China

来源：

FRONTIERS OF PHYSICS | 2017年 / 12卷 / 05期

基金：

美国国家科学基金会;

关键词：

mid-infrared pump; terahertz spectroscopy; FIELD-RESOLVED DETECTION; PULSES; SUPERCONDUCTOR; GENERATION; TRANSIENTS; AMPLITUDES; CUPRATE; TIME; WAVE; THZ;

D O I：

10.1007/s11467-017-0716-4

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Strong-field mid-infrared pump-terahertz (THz) probe spectroscopy has been proven as a powerful tool for light control of different orders in strongly correlated materials. We report the construction of an ultrafast broadband infrared pump-THz probe system in reflection geometry. A two-output optical parametric amplifier is used for generating mid-infrared pulses with GaSe as the nonlinear crystal. The setup is capable of pumping bulk materials at wavelengths ranging from 1.2 mu m to 15 mu m and beyond, and detecting the subtle, transient photoinduced changes in the reflected electric field of the THz probe at different temperatures. As a demonstration, we present 15 mu m pump-THz probe measurements of a bulk EuSbTe3 single crystal. A 0.5 % transient change in the reflected THz electric field can be clearly resolved. The widely tuned pumping energy could be used in mode-selective excitation experiments and applied to many strongly correlated electron systems.

引用

页数：5

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