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Terahertz-induced Kerr-effect in Relaxor Ferroelectrics

  • Matthias C Hoffmann (a1), Harold Y Hwang (a2), Nathaniel C Brandt (a3), Ka-Lo Yeh (a4) and Keith A Nelson (a5)...

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.

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