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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

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

Bibliographical note

Publisher Copyright:
© 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Keywords

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

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