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

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

Research output: Contribution to journalArticlepeer-review

25 Scopus citations

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.

Original languageEnglish (US)
Pages (from-to)6371-6375
Number of pages5
JournalAdvanced Materials
Volume27
Issue number41
DOIs
StatePublished - Nov 1 2015
Externally publishedYes

Keywords

  • ferroelectrics
  • nonlinear optical properties
  • terahertz modulators
  • ultra-fast

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