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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 https://orcid.org/0000-0002-2719-6985 (unconfirmed)
Kii, Toshiteru
Ohgaki, Hideaki  kyouindb  KAKEN_id  orcid https://orcid.org/0000-0002-3553-4091 (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.
URI: http://hdl.handle.net/2433/202012
DOI(Published Version): 10.1063/1.4927666
Appears in Collections:Journal Articles

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