Report
Terahertz Kerr effect in a methylammonium lead bromide perovskite crystal
| العنوان: | Terahertz Kerr effect in a methylammonium lead bromide perovskite crystal |
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| المؤلفون: | Melnikov, A. A., Anikeeva, V. E., Semenova, O. I., Chekalin, S. V. |
| المصدر: | Phys. Rev. B 105, 174304 (2022) |
| سنة النشر: | 2021 |
| المجموعة: | Condensed Matter Physics (Other) |
| مصطلحات موضوعية: | Condensed Matter - Materials Science, Physics - Applied Physics |
| الوصف: | We have observed short-lived optical birefringence in a CH$_3$NH$_3$PbBr$_3$ single crystal induced by a powerful nearly single-cycle terahertz pulse. Apart from the instantaneous contribution that follows the profile of the squared pump electric field, the recorded anisotropy signal contains an exponential component decaying in $\sim$ 350 fs, underdamped oscillations at the frequency of $\sim$ 0.16 THz and an intermediate picosecond relaxation process with a Gaussian tail. We associate these three non-trivial features with, respectively, Kerr effect in the inorganic lattice, terahertz-induced transient alignment of CH$_3$NH$_3^+$ cations, and their coherent rotation excited by the terahertz pulse in a Raman process. Comment: 8 pages, 4 figures |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1103/PhysRevB.105.174304 |
| URL الوصول: | http://arxiv.org/abs/2110.08234 |
| رقم الانضمام: | edsarx.2110.08234 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1103/PhysRevB.105.174304 |
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