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Experimental observation of frequency up-conversion by flash ionization

Authors :
Yasuhiko Sentoku
Masahiro Nakata
A. Nishida
Ryosuke Kodama
Takeshi Higashiguchi
Takamitsu Otsuka
Fuminori Suzuki
Noboru Yugami
Source :
Applied Physics Letters. 101:161118
Publication Year :
2012
Publisher :
AIP Publishing, 2012.

Abstract

We have demonstrated frequency up-conversion in the terahertz (THz) region by flash ionization, which occurs due a terahertz wave interacting with a plasma created by an ultrashort laser pulse. The upshift frequency is controlled by the plasma density. We performed a proof-of-principle experiment with a plasma creation time scale much shorter than the period of the electromagnetic wave and a plasma length longer than its wavelength. We upshifted the frequency from 0.35 to 3.5 THz by irradiating a ZnSe crystal with a Ti:sapphire laser pulse.

Details

ISSN :
10773118 and 00036951
Volume :
101
Database :
OpenAIRE
Journal :
Applied Physics Letters
Accession number :
edsair.doi...........1f5fe24e5fc19ff5b242f246932f83c9
Full Text :
https://doi.org/10.1063/1.4755843