Noncollinear Electro-Optic Sampling of Terahertz Waves in a Thick GaAs Crystal

Author

Mashkovich, Eugene A. ; Shugurov, Alexander I. ; Ozawa, Shipei ; Estacio, Elmer ; Tani, Masahiko ; Bakunov, Michael I.

Author_Institution

Gen. Phys. Dept., Univ. of Nizhny Novgorod, Nizhny Novgorod, Russia

Volume

5

Issue

5

fYear

2015

Firstpage

732

Lastpage

736

Abstract

In this paper, we propose and experimentally demonstrate noncollinear EO sampling of terahertz pulses with a femtosecond fiber laser in cm-thick GaAs crystals. This technique provides more than an order of magnitude improvement in spectral resolution and a significant increase in efficiency as compared to previously used collinear EO sampling in mm- and sub-mm-thick GaAs crystals. The optimal incidence angle of the probe beam on the crystal is found to be 42 ^°-50 ^° and the optimal crystal thickness is ~ 1-3 cm.

Keywords

III-V semiconductors; electro-optical effects; gallium arsenide; high-speed optical techniques; terahertz waves; GaAs; femtosecond fiber laser; noncollinear EO sampling; noncollinear electrooptic sampling; optimal incidence angle; spectral resolution; terahertz waves; Crystals; Electrooptical waveguides; Gallium arsenide; Laser beams; Optical beams; Optical pulses; Probes; GaAs; Terahertz detection; electro-optic sampling; noncollinear;

fLanguage

English

Journal_Title

Terahertz Science and Technology, IEEE Transactions on

Publisher

ieee

ISSN

2156-342X

Type

jour

DOI

10.1109/TTHZ.2015.2461439

Filename

7210239