Effect of a Magnetic Field on Wideband Terahertz Generation on the Surface of Semiconductors

Author

Antsygin, Valery D. ; Mamrashev, Alexander A. ; Nikolaev, Nazar A. ; Potaturkin, Oleg I.

Author_Institution

Inst. of Autom. & Electrometry, Novosibirsk, Russia

Volume

5

Issue

4

fYear

2015

fDate

Jul-15

Firstpage

673

Lastpage

679

Abstract

The effect of a magnetic field on the enhancement of the efficiency of terahertz (THz) generation on the surface of narrow-gap semiconductors is analyzed. A novel small-size THz generator is proposed. It consists of two permanent magnets with opposite magnetization placed on a yoke forming Kittel structure. The construction provides magnetic field concentration in the active zone of a semiconductor placed closely on top of the magnets. Its capabilities of converting femtosecond pulses of the first and second harmonics of an erbium fiber laser are investigated by THz time-domain spectrometer. n-InAs and n-InSb semiconductors in the magnetic field of 0.8 T prove to be the best THz generators at 775- and 1550-nm pump wavelengths correspondingly.

Keywords

III-V semiconductors; erbium; fibre lasers; high-speed optical techniques; indium compounds; narrow band gap semiconductors; optical harmonic generation; terahertz wave generation; terahertz wave spectra; Er; InAs; InSb; THz time-domain spectrometry; erbium fiber laser; femtosecond pulses; magnetic field concentration; magnetic flux density 0.8 T; magnetization; narrow-gap semiconductors; permanent magnets; terahertz generation; wavelength 1550 nm; wavelength 775 nm; yoke-forming Kittel structure; Laser excitation; Magnetic semiconductors; Optical surface waves; Perpendicular magnetic anisotropy; Saturation magnetization; Semiconductor lasers; InAs; InSb; THz spectroscopy; magnetic field; narrow-gap semiconductor; optical rectification; photo-Dember effect; terahertz (THz) generator;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2015.2443493

Filename

7137677