CST – Computer Simulation Technology

Ultrafast Terahertz Gating of the Polarization and Giant Nonlinear Optical Response in BiFeO3 Thin Films

Title:
Ultrafast Terahertz Gating of the Polarization and Giant Nonlinear Optical Response in BiFeO3 Thin Films
Author(s):
Frank Chen , John Goodfellow , Shi Liu , Ilya Grinberg , Matthias C. Hoffmann ,Anoop R. Damodaran , Yi Zhu , Peter Zalden , Xiaohang Zhang , Ichiro Takeuchi , Andrew M. Rappe , Lane W. Martin , Haidan Wen , Aaron M. Lindenberg
Vol./Issue/Date:
Vol 27
Year:
2016
Page(s):
6371–6375
Abstract:
Terahertz pulses are applied as an all-optical bias to ferroelectric thin-film BiFeO3 while monitoring the time-dependent ferroelectric polarization through its nonlinear optical response. Modulations in the intensity of the second harmonic light generated by the film correspond to on–off ratios of 220× gateable on femtosecond timescales. Polarization modulations comparable to the built-in static polarization are observed.
Document:

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