Bulletin of the American Physical Society
APS March Meeting 2019
Volume 64, Number 2
Monday–Friday, March 4–8, 2019; Boston, Massachusetts
Session E02: Dielectric & Ferroic Oxides -- Optically Induced Properties and Optical Measurements
8:00 AM–11:00 AM,
Tuesday, March 5, 2019
BCEC
Room: 107A
Sponsoring
Units:
DMP DCOMP
Chair: Dennis Meier
Abstract: E02.00002 : Ultrafast optical control of ferroelectric polarization via resonant magnon excitation*
8:12 AM–8:24 AM
Presenter:
Haricharan Padmanabhan
(Pennsylvania State University)
Authors:
Haricharan Padmanabhan
(Pennsylvania State University)
Yakun Yuan
(Pennsylvania State University)
Alexander Melville
(Massachusetts Institute of Technology)
Darrell G. Schlom
(Cornell University)
Venkatraman Gopalan
(Pennsylvania State University)
In this work, we demonstrate a transient suppression of the ferroelectric polarization in the prototypical multiferroic BiFeO3 by resonant excitation of a magnon coupled to the ferroelectric mode. Ultrafast pump-probe measurements using a second harmonic generation probe reveal that the suppression and recovery of the polarization occur at a femtosecond timescale. Furthermore, we observe that the zero polarization transient state can be stabilized by tuning the domain structure of the lattice, increasing its lifetime by one order of magnitude.
*DOE Grant No. DE-SC0012375
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