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Title: Excitonic enhancement of optical nonlinearities in perovskite CH₃NH₃PbCl₃ single crystals
Authors: Ohara, Keiichi
Yamada, Takumi
Tahara, Hirokazu  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-0738-5623 (unconfirmed)
Aharen, Tomoko
Hirori, Hideki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0001-6056-8675 (unconfirmed)
Suzuura, Hidekatsu
Kanemitsu, Yoshihiko  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-0788-131X (unconfirmed)
Author's alias: 山田, 琢允
田原, 弘量
廣理, 英基
金光, 義彦
Issue Date: Nov-2019
Publisher: American Physical Society
Journal title: Physical Review Materials
Volume: 3
Issue: 11
Thesis number: 111601(R)
Abstract: Metal halide perovskites have emerged as versatile photonic device materials because of their outstanding band structure and excellent optical properties. Here, we determined the excitation wavelength dependences of the two-photon absorption coefficient and the Kerr-effect-induced nonlinear refractive index of CH₃NH₃PbCl₃ perovskite single crystals by means of the Z-scan method. From theoretical analysis, we found that the electron-hole interaction, so-called exciton effect, significantly enhances the nonlinear optical responses even for the interband transitions. This interaction explains the universal relation between the exciton reduced mass and the bandgap for lead halide perovskites.
Rights: Published by the American Physical Society under the terms of the Creative Commons Attribution 4.0 International license. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI.
URI: http://hdl.handle.net/2433/261136
DOI(Published Version): 10.1103/PhysRevMaterials.3.111601
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