Solution-processed Faraday rotators using single crystal lead halide perovskites

Randy P. Sabatini, Chwenhaw Liao, Stefano Bernardi, Wenxin Mao, Matthew S. Rahme, Asaph Widmer-Cooper, Udo Bach, Shujuan Huang, Anita W. Y. Ho-Baillie, Girish Lakhwani*

*Corresponding author for this work

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Abstract

Lead halide perovskites (LHPs) have become a promising alternative for a wide range of optoelectronic devices, thanks to their solution-processability and impressive optical and electrical properties. More recently, LHPs have been investigated in magneto-optic studies and have exhibited spin-polarized emission, photoinduced magnetization, and long spin lifetimes. Here, the viability of methylammonium lead bromide (MAPbBr3) single crystals as solution-processed Faraday rotators is demonstrated. Compared to terbium gallium garnet, the industry standard in the visible, it is found that MAPbBr3 exhibits Verdet constants (i.e., strength of Faraday effect) of similar or greater magnitude (up to 2.5x higher), with lower temperature dependence. Due to its low trap absorption, it is calculated that an optical isolator made from MAPbBr3, with appropriate antireflection coatings, should reach ≈95% transmission and achieve 40 dB isolation for incoming powers of over 2 W. It is also shown that the Verdet constant of MAPbBr3 can be calculated accurately from its dispersion in refractive index, allowing the possibility to predict similar effects in other perovskite materials.

Original languageEnglish
Article number1902950
Pages (from-to)1-8
Number of pages8
JournalAdvanced Science
Volume7
Issue number7
Early online date13 Feb 2020
DOIs
Publication statusPublished - 8 Apr 2020

Bibliographical note

Copyright the Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Faraday rotation
  • magneto-optics
  • methylammonium lead bromide
  • optical rotation
  • perovskites
  • single crystals
  • terbium gallium garnet
  • Verdet constant

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    Sabatini, R. P., Liao, C., Bernardi, S., Mao, W., Rahme, M. S., Widmer-Cooper, A., ... Lakhwani, G. (2020). Solution-processed Faraday rotators using single crystal lead halide perovskites. Advanced Science, 7(7), 1-8. [1902950]. https://doi.org/10.1002/advs.201902950