Direct conversion of THz emission from a periodic electrostatic field by use of a laser-produced relativistic ionization front

Author

Ohata, Nobuo ; Li, Kun ; Higashiguchi, Takeshi ; Yugami, Noboru

Author_Institution

Dept. of Energy & Environ. Sci., Utsunomiya Univ., Utsunomiya

fYear

2007

fDate

2-9 Sept. 2007

Firstpage

460

Lastpage

461

Abstract

We report on the first demonstration of a novel THz source by use of an ultrashort-laser-produced ionization front. THz radiation is generated through the spatiotemporal change in electron plasma density induced by a relativistic ionization front propagating in a periodic electrostatic field in a ZnSe crystal. The central emission frequency is 1.2 THz with a bandwidth of 0.7 THz (FWHM). The central frequency is attributed to production of the electron plasma density of the order of 1015 cm^-3 and is in good agreement with the expected theoretical value.

Keywords

electrostatics; optical frequency conversion; submillimetre wave lasers; THz emission direct conversion; THz radiation; ZnSe; central emission frequency; electron plasma density; frequency 1.2 THz; laser-produced relativistic ionization front; periodic electrostatic field; Bandwidth; Electrons; Electrostatics; Frequency; Ionization; Ionizing radiation; Optical propagation; Plasma density; Spatiotemporal phenomena; Zinc compounds; Frequency conversion; THz source; relativistic ionization front;

fLanguage

English

Publisher

ieee

Conference_Titel

Infrared and Millimeter Waves, 2007 and the 2007 15th International Conference on Terahertz Electronics. IRMMW-THz. Joint 32nd International Conference on

Conference_Location

Cardiff

Print_ISBN

978-1-4244-1438-3

Type

conf

DOI

10.1109/ICIMW.2007.4516581

Filename

4516581