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Journal Articles MRS Communications Year : 2023

Photoinduced modification of optical properties of ferroelectric PZT thin films

Abstract

This study investigates ultrafast photoinduced changes in optical properties of ferroelectrics (PZT) on femtosecond to nanosecond timescales, using broadband transient reflectivity studies. Surprisingly, spectral features were observed below the bandgap, which could not be attributed to ground state bleaching, excited state absorption, and/or stimulated emission. A model based on probe energy independent changes in refractive index and extinction coefficient showed good agreement with experimental results. Three relaxation processes were phenomenologically considered for the temporal evolution. Laser-induced heating was ruled out as the cause of short timescale behavior and photorefractive effect was suggested as a potential mechanism for changes in the optical properties. Graphical abstract
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hal-04611698 , version 1 (13-06-2024)

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Saeed Yousefi, Nelson Hua, Jugal Mehta, Jianheng Li, Loïc Guillemot, et al.. Photoinduced modification of optical properties of ferroelectric PZT thin films. MRS Communications, 2023, 14 (1), pp.17-25. ⟨10.1557/s43579-023-00476-6⟩. ⟨hal-04611698⟩
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