Open AccessScaling behavior of ultrafast two-color terahertz generation in plasma gas targets: energy and pressure dependence
Author(s) -
George Rodriguez,
Georgi L. Dakovski
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.015130
Subject(s) - terahertz radiation , ultrashort pulse , xenon , krypton , materials science , optics , neon , laser , terahertz spectroscopy and technology , plasma , argon , pulse duration , atomic physics , ultrafast laser spectroscopy , photomixing , far infrared laser , optoelectronics , physics , quantum mechanics , terahertz metamaterials
Ultrafast terahertz emission from two-color generated laser plasma gas targets is studied using air and the noble gases (neon, argon, krypton, and xenon) as the generation media. Terahertz output pulse energy and power spectra are measured as function of gas species, gas pressure, and input pulse energy up to 6 mJ per pulse using a 40-fs 1-kHz Ti:sapphire laser system as the drive source. Terahertz pulse energies approaching 1 microJ per pulse with spectral content out to 40 THz and pulse duration of 35 fs is reported. A simple one dimensional transient photocurrent ionization model is used to calculate the spectra showing good agreement with experiments.