"

Cookies ussage consent

Our site saves small pieces of text information (cookies) on your device in order to deliver better content and for statistical purposes. You can disable the usage of cookies by changing the settings of your browser. By browsing our site without changing the browser settings you grant us permission to store that information on your device.

I agree, do not show this message again.

Non-linear optical susceptibilities and electro-optic tensor of some ferroelectrics: first principle study

SULEYMAN CABUK1,*

Affiliation

  1. Cukurova University, Faculty of Science and Letters, Physics Department, Adana, 01330, Turkey

Abstract

The linear and nonlinear optical properties of some ferroelectrics (BaTiO3, KNbO3, LiTaO3 and LiNbO3) are studied by density functional theory (DFT) in the local density approximation (LDA) expressions based on first principle calculations without the scissor approximation. Specially, we present calculations of the frequency- dependent complex dielectric function ε (ω) and the second harmonic generation response coefficient χ(2) (-2ω,ω,ω) over a large frequency range in tetragonal and rhombohedral phases. The electronic linear electrooptic susceptibility χ(2) (-ω,ω,0) is also evaluated below the band gap. These results are based on a series of the LDA calculation using DFT. Results for χ(2) (-ω,ω,0) are in agreement with experiment below band gap and those for χ(2)(-2ω,ω,ω) are compared with experimental data where available..

Keywords

Nonlinear optical susceptibility, Electro-optic tensor, Ferroelectric oxide.

Submitted at: June 4, 2008
Accepted at: March 24, 2009

Citation

SULEYMAN CABUK, Non-linear optical susceptibilities and electro-optic tensor of some ferroelectrics: first principle study, Journal of Optoelectronics and Advanced Materials Vol. 11, Iss. 3, pp. 280-288 (2009)