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Title: Time-resolved detection of structural change in polyethylene films using mid-infrared laser pulses
Authors: Ageev, Eduard
Mizobata, Keisuke
Nakajima, Takashi
Zen, Heishun  kyouindb  KAKEN_id  orcid (unconfirmed)
Kii, Toshiteru
Ohgaki, Hideaki  kyouindb  KAKEN_id  orcid (unconfirmed)
Author's alias: 中嶋, 隆
Issue Date: 29-Jul-2015
Publisher: AIP Publishing
Journal title: Applied Physics Letters
Volume: 107
Issue: 4
Thesis number: 041904
Abstract: Some of the vibrational modes of crystalline organic polymers are known to be sensitive to the structural change from the crystalline phase to the amorphous phase, and vice versa. Using a mid-infrared (mid-IR) pulse from a free-electron laser as a probe, we demonstrate the time-resolved detection of structural change in crystalline polymer (polyethylene) films upon laser heating by a Q-switched Nd:YAG laser. Transmittance of the resonant mid-IR pulse almost instantaneously changes before and after the Nd:YAG laser pulse if its fluence is sufficient to induce the structural change in the film. The developed technique would be useful to study the time-dependent dynamics of the structural change in various materials.
Rights: © 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.
DOI(Published Version): 10.1063/1.4927666
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