Terahertz wave emission from laser-induced micro-plasma

Author

Buccheri, F. ; Zhang, X.-C.

Author_Institution

Inst. of Opt., Univ. of Rochester, Rochester, NY, USA

fYear

2014

fDate

14-19 Sept. 2014

Firstpage

1

Lastpage

2

Abstract

Laser-induced plasmas with longitudinal size smaller than 40 μm are investigated as a source of broadband terahertz (THz) radiation. The angular dependent emission of the micro-plasma is measured with coherent detection, and the preferential directions of radiation are identified. The observations support electrons drift driven by the laser ponderomotive force as the principal generation mechanism. We also report the measurement of THz waveforms with pump pulse energies as low as 0.66 μJ. The experimental results suggest the laser-induced micro-plasma as a promising approach to scale down the power budget for broadband terahertz spectroscopy.

Keywords

laser beam effects; plasma production by laser; spectroscopic light sources; terahertz spectroscopy; terahertz waves; THz waveforms; angular dependent emission; broadband THz radiation; broadband terahertz radiation; broadband terahertz spectroscopy; coherent detection; electrons drift; laser ponderomotive force; laser-induced microplasma; longitudinal size; principal generation mechanism; pump pulse energies; terahertz wave emission; Gas lasers; Laser beams; Laser excitation; Measurement by laser beam; Optics; Plasmas; Pump lasers;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2014 39th International Conference on

Conference_Location

Tucson, AZ

Type

conf

DOI

10.1109/IRMMW-THz.2014.6956075

Filename

6956075