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Terahertz-induced Kerr-effect in Relaxor Ferroelectrics

Published online by Cambridge University Press:  31 January 2011

Matthias C Hoffmann ,
Harold Y Hwang ,
Nathaniel C Brandt ,
Ka-Lo Yeh  and
Keith A Nelson
Matthias C Hoffmann
Affiliation:
mch@mit.edumatthias.c.hoffmann@desy.de, Max Planck Group for Structural Dynamics, CFEL, University of Hamburg, Hamburg, Germany
Harold Y Hwang
Affiliation:
hhwang82@mit.edu, Massachusetts Institute of Technology, Department of Chemistry, Cambridge, Massachusetts, United States
Nathaniel C Brandt
Affiliation:
mcbrandt@mit.edu, Massachusetts Institute of Technology, Department of Chemistry, Cambridge, Massachusetts, United States
Ka-Lo Yeh
Affiliation:
kaloyeh@mit.edu, Massachusetts Institute of Technology, Department of Chemistry, Cambridge, Massachusetts, United States
Keith A Nelson
Affiliation:
kanelson@mit.edu
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Abstract

We demonstrate the Kerr-effect induced by the electric field of single-cycle THz pulses in the relaxor ferroelectrics potassium-tantalum niobate KTa1-xNbxO3 (KTN) and K1-yLiyTa1-xNbxO3 (KLTN). We find a slow orientational relaxation with a time constant of 6 ps in KTN with x=1.8% at room temperature, that decreases upon approaching the transition temperature.

Keywords

ferroelectricitylaserinfrared (IR) spectroscopy
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1230: Symposium MM – Ultrafast Processes in Materials Science , 2009 , 1230-MM04-08
Copyright
Copyright © Materials Research Society 2010

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