Electro-optic sampling of terahertz pulses using BaTiO3 in non-collinear Cherenkov phase-matching scheme

Author

Shinpei Ozawa;Taka-aki Hori;Syougo Azuma;Stefan Funkner;Gudrun Niehues;Kohji Yamamoto;Takashi Furuya;Hideaki Kitahara;Gabriel Banciu;Liviu Nedelcu;Elmer Estacio;Michael I. Bakunov;Masahiko Tani

Author_Institution

Research Center for Development of Far-Infrared Region, University of Fukui, Fukui 910-8507, Japan

fYear

2015

Firstpage

1

Lastpage

2

Abstract

In this paper we report electro-optic (EO) sampling of THz pulses using ferroelectric crystal in the non-collinear Cherenkov phase-matching scheme, where an effective velocity matching is achieved in an EO crystal with a large refractive index in the THz frequency region. We demonstrate efficient THz EO sampling using LiNbO₃ and BaTiO₃ crystals in the Cherenkov- phase-matching scheme. It is shown that the efficiency of EO sampling with BaTiO3 is smaller than that with LiNbO₃, even though the EO coefficient (r₃₃) of BaTiO₃ is three times higher than that of LiNbO₃. The reason of the poor performance of BaTiO₃ is attributed to the strong absorption in the THz frequency region.

Keywords

"Lithium niobate","Crystals","Electrooptical waveguides","Optical frequency conversion","Optical pulses","Optical polarization"

Publisher

ieee

Conference_Titel

Infrared, Millimeter, and Terahertz waves (IRMMW-THz), 2015 40th International Conference on

ISSN

2162-2027

Electronic_ISBN

2162-2035

Type

conf

DOI

10.1109/IRMMW-THz.2015.7327566

Filename

7327566