Nonlinear coefficient and temperature dependence of the refractive index of lithium niobate crystals in the terahertz regime | Health & Environmental Research Online (HERO)

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Citation
Tags

HERO ID

2629887

Reference Type

Journal Article

Title

Nonlinear coefficient and temperature dependence of the refractive index of lithium niobate crystals in the terahertz regime

Author(s)

Sowade, R; Breunig, I; Tulea, C; Buse, K

Year

2010

Is Peer Reviewed?

Yes

Journal

Applied Physics B
ISSN: 0946-2171
EISSN: 1432-0649

Volume

Issue

1-2

Page Numbers

63-66

DOI

10.1007/s00340-010-3897-x

Web of Science Id

WOS:000275892200010

Abstract

The effective nonlinear coefficient d (eff) of lithium niobate is determined to be 94 pm/V for a process that converts infrared light to 1.35 THz radiation. This value is inferred from the performance of a continuous-wave, singly-resonant optical parametric oscillator, in which the cavity-enhanced signal wave of a primary parametric process acts as a pump wave for a cascaded process, generating terahertz waves. To quantify the nonlinear coefficient, the coupled wave equations including absorption are evaluated. Furthermore, from our measurements we also determine the temperature dependence of the refractive index to be dn (THz)/dT=0.0013/K around 1.4 THz.