Enhanced THz radiation from YBCO thin film bow-tie antennas with hyper-hemispherical MgO lens

Author

Tonouchi, M. ; Tani, M. ; Wang, Z. ; Sakai, K. ; Hangyo, M. ; Wada, N. ; Murakami, Y.

Author_Institution

Kansai Adv. Res. Center, Commun. Res. Lab., Kobe, Japan

Volume

7

Issue

2

fYear

1997

fDate

6/1/1997 12:00:00 AM

Firstpage

2913

Lastpage

2916

Abstract

We demonstrate power enhancement of terahertz (THz) radiation from YBCO thin films. An ultra-wide-band electromagnetic pulse, which contains frequency components over 3 THz, was excited by ultrafast supercurrent modulation with femtosecond optical pulse irradiation. The maximum THz radiation power emitted into free space was achieved up to 0.5 /spl mu/W with the combination of a bow-tie antenna and an MgO hyper-hemispherical lens. We discuss the radiation power dependence on temperature, excitation power, and bias supercurrent.

Keywords

barium compounds; high-temperature superconductors; lens antennas; magnesium compounds; submillimetre wave antennas; superconducting microwave devices; superconducting thin films; yttrium compounds; 0.5 muW; 3 THz; MgO; YBCO thin film bow-tie antenna; YBaCuO; femtosecond optical pulse irradiation; hyper-hemispherical MgO lens; terahertz radiation power; ultra-wide-band electromagnetic pulse; ultrafast supercurrent; EMP radiation effects; Frequency; Lenses; Optical modulation; Optical pulses; Pulse modulation; Transistors; Ultra wideband technology; Ultrafast optics; Yttrium barium copper oxide;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.621910

Filename

621910