Generation of terahertz radiation from ionizing two-color laser pulses in Ar filled metallic hollow waveguides

Details Generation of terahertz radiation from ionizing two-color laser pulses in Ar filled metallic hollow waveguides Generation of terahertz radiation from ionizing two-color laser pulses in Ar filled metallic hollow waveguides

2010-02-24

arxiv.org/abs/1002.4582v1

Opt. Express, 18, 9658b (2010)

Physics

Optics

6 pages, 3 figures

Scientific paper

10.1364/OE.18.009658

The generation of THz radiation from ionizing two-color femtosecond pulses propagating in metallic hollow waveguides filled with Ar is numerically studied. We observe a strong reshaping of the low-frequency part of the spectrum. Namely, after several millimeters of propagation the spectrum is extended from hundreds of GHz up to ~150 THz. For longer propagation distances, nearly single-cycle near-infrared pulses with wavelengths around 4.5 um are obtained by appropriate spectral filtering, with an efficiency of up to 0.25%.

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