产生具有高电场振幅的单周期太赫兹瞬态。

Generation of single-cycle THz transients with high electric-field amplitudes.

作者信息

Bartel T, Gaal P, Reimann K, Woerner M, Elsaesser T

机构信息

Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie, Berlin, Germany.

出版信息

Opt Lett. 2005 Oct 15;30(20):2805-7. doi: 10.1364/ol.30.002805.

DOI:10.1364/ol.30.002805

PMID:16252781

Abstract

Single-cycle terahertz (THz) transients in the frequency range 0.3-7 THz with electric-field amplitudes of more than 400 kV/cm are generated by four-wave mixing of the fundamental and the second harmonic of 25 fs pulses from a Ti:sapphire amplifier in ionized air. These transients are fully characterized by electro-optic sampling with ZnTe and GaP crystals. One can tune the center frequency of the THz transients by varying the length of the incident pulse. The electric-field amplitude increases linearly with the incident pulse energy.

摘要

通过钛宝石放大器产生的25飞秒脉冲的基波和二次谐波在电离空气中进行四波混频，可产生频率范围为0.3 - 7太赫兹、电场幅度超过400 kV/cm的单周期太赫兹瞬态。这些瞬态通过使用碲化锌（ZnTe）和磷化镓（GaP）晶体的电光采样进行全面表征。通过改变入射脉冲的长度，可以调节太赫兹瞬态的中心频率。电场幅度随入射脉冲能量线性增加。