Terahertz wave emission from a liquid water film under the excitation of asymmetric optical fields

被引：49

作者：

Jin, Qi ^{[1
]}

Dai, Jianming ^{[2
,3
]}

Yiwen, E. ^{[1
]}

Zhang, Xi-Cheng ^{[1
,4
]}

机构：

[1] Univ Rochester, Inst Opt, Rochester, NY 14627 USA

[2] Tianjin Univ, Ctr Terahertz Waves, Tianjin 300072, Peoples R China

[3] Tianjin Univ, Sch Precis Instrument & Optoelect Engn, Tianjin 300072, Peoples R China

[4] Capital Normal Univ, Beijing Adv Innovat Ctr Imaging Technol, Beijing 100037, Peoples R China

来源：

APPLIED PHYSICS LETTERS | 2018年 / 113卷 / 26期

基金：

中国国家自然科学基金;

关键词：

LASER-INDUCED BREAKDOWN; PULSES; GENERATION; AIR; THRESHOLDS;

D O I：

10.1063/1.5064644

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

Liquid water excited by intense two-color laser pulses radiates electromagnetic waves at terahertz frequencies. Compared with one-color excitation, two-orders of magnitude enhanced terahertz energy are observed by using asymmetric optical excitation with the same total excitation pulse energy and focusing geometry. Modulation of the terahertz field is achieved via the coherent control approach. We find that modulated and unmodulated terahertz energies have, respectively, quadratic and linear dependence on the laser pulse energy. This work, as part of terahertz aqueous photonics, paves an alternative way of studying laser-liquid interactions and developing intense terahertz sources. Published by AIP Publishing.

引用

页数：4

共 26 条

[1] Intense terahertz pulses by four-wave rectification in air [J].