Coherent phonon dynamics in a c-plane sapphire crystal before and after intense femtosecond laser irradiation
Coherent phonon dynamics in a c-plane sapphire crystal before and after intense femtosecond laser irradiation
Femtosecond pump-probe experiments with a ∼6.4 fs time-resolution were performed to investigate the coherent phonon dynamics in a c-plane sapphire crystal before and after intense 800 nm femtosecond laser irradiation. The intense femtosecond laser induced defect/distortion and even re-crystallization of crystalline structures, which result in the appearance of new peaks and relative intensity change in coherent phonon and Raman spectra. The combination of these two spectra was found to be beneficial to evidence the variation of crystalline structure and further to differentiate the origins of new Raman peaks after irradiation. Further analysis of time-dependent differential absorbance with damped cosine function fitting and Fourier transfer calculation yields the vibrational parameters, including periods, damping times and initial phases, before and after irradiation. With these parameters, the defect-effects on damping time and the mechanism of coherent phonon generation were addressed.
16003-16011
Zhao, Xin
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Nie, Zhaogang
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Ma, Lin
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Zhang, Fangteng
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Hao, Mingming
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Wang, Bo
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Zhao, Weiren
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Luo, Li
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Zhang, Jiahua
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Huang, Chung-Che
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25 May 2020
Zhao, Xin
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Nie, Zhaogang
7a466e90-4931-4f37-8a54-a083badffce3
Ma, Lin
28467018-254e-4939-89b3-d63467c5eec5
Zhang, Fangteng
180017f9-679c-485e-914d-9d74c5d055ed
Hao, Mingming
1bd0d2ed-e857-47f6-a3b2-37c13e620fe1
Wang, Bo
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Zhao, Weiren
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Luo, Li
77028676-d147-497e-b26e-3ab29f2c453c
Zhang, Jiahua
baf10f58-4ca3-48b9-b648-bd67f1bc638b
Huang, Chung-Che
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Zhao, Xin, Nie, Zhaogang, Ma, Lin, Zhang, Fangteng, Hao, Mingming, Wang, Bo, Zhao, Weiren, Luo, Li, Zhang, Jiahua and Huang, Chung-Che
(2020)
Coherent phonon dynamics in a c-plane sapphire crystal before and after intense femtosecond laser irradiation.
Optics Express, 28 (11), .
(doi:10.1364/OE.392505).
Abstract
Femtosecond pump-probe experiments with a ∼6.4 fs time-resolution were performed to investigate the coherent phonon dynamics in a c-plane sapphire crystal before and after intense 800 nm femtosecond laser irradiation. The intense femtosecond laser induced defect/distortion and even re-crystallization of crystalline structures, which result in the appearance of new peaks and relative intensity change in coherent phonon and Raman spectra. The combination of these two spectra was found to be beneficial to evidence the variation of crystalline structure and further to differentiate the origins of new Raman peaks after irradiation. Further analysis of time-dependent differential absorbance with damped cosine function fitting and Fourier transfer calculation yields the vibrational parameters, including periods, damping times and initial phases, before and after irradiation. With these parameters, the defect-effects on damping time and the mechanism of coherent phonon generation were addressed.
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Optics_Express_Coherent_phonon_dynamics_in_a_c_plane_sapphire_crystal_before_and_after_intense_femtosecond_laser_irradiation_
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Optics Express_Coherent phonon dynamics in a c-plane sapphire crystal before and after intense femtosecond laser irradiation
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Accepted/In Press date: 6 May 2020
e-pub ahead of print date: 13 May 2020
Published date: 25 May 2020
Identifiers
Local EPrints ID: 441018
URI: http://eprints.soton.ac.uk/id/eprint/441018
ISSN: 1094-4087
PURE UUID: 810b54af-5666-4f1b-814a-4714b85bc086
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Date deposited: 27 May 2020 16:55
Last modified: 17 Mar 2024 03:03
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Contributors
Author:
Xin Zhao
Author:
Zhaogang Nie
Author:
Lin Ma
Author:
Fangteng Zhang
Author:
Mingming Hao
Author:
Bo Wang
Author:
Weiren Zhao
Author:
Li Luo
Author:
Jiahua Zhang
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