Multiphoton laser-induced confined chemical changes in polymer films

Deepak L.N. Kallepalli; Alan T.K. Godfrey; Jaspreet Walia; Fabio Variola; André Staudte; Chunmei Zhang; Zygmunt J. Jakubek; P. B. Corkum

doi:10.1364/OE.389215

Multiphoton laser-induced confined chemical changes in polymer films

Deepak L.N. Kallepalli, Alan T.K. Godfrey, Jaspreet Walia, Fabio Variola, André Staudte, Chunmei Zhang, Zygmunt J. Jakubek, P. B. Corkum^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

We report ultrafast-laser-induced photochemical, structural, and morphological changes in a polyimide film irradiated at the polymer-glass interface in back-incident geometry. Back-illumination creates locally hot material at the interface leading to a confined photochemical change at the interface and a morphological change through a blister formation. The laser-induced photochemical changes in polyimide resulted in new absorption and luminescence properties in the visible region. The laser-treated polyimide exhibited photoluminescence anisotropy resulting from formation of ordered polymer upon irradiation by linearly polarized ultrashort laser pulses. Confocal fluorescence microscopy resulted in similar observations to the bulk. Reflection-absorption infrared spectroscopy and X-ray photoelectron spectroscopy together indicated confinement of laser-induced chemical changes at the interface.

Original language	English
Pages (from-to)	11267-11279
Number of pages	13
Journal	Optics Express
Volume	28
Issue number	8
DOIs	https://doi.org/10.1364/OE.389215
Publication status	Published - 13 Apr 2020
Externally published	Yes

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title = "Multiphoton laser-induced confined chemical changes in polymer films",

abstract = "We report ultrafast-laser-induced photochemical, structural, and morphological changes in a polyimide film irradiated at the polymer-glass interface in back-incident geometry. Back-illumination creates locally hot material at the interface leading to a confined photochemical change at the interface and a morphological change through a blister formation. The laser-induced photochemical changes in polyimide resulted in new absorption and luminescence properties in the visible region. The laser-treated polyimide exhibited photoluminescence anisotropy resulting from formation of ordered polymer upon irradiation by linearly polarized ultrashort laser pulses. Confocal fluorescence microscopy resulted in similar observations to the bulk. Reflection-absorption infrared spectroscopy and X-ray photoelectron spectroscopy together indicated confinement of laser-induced chemical changes at the interface.",

author = "Kallepalli, {Deepak L.N.} and Godfrey, {Alan T.K.} and Jaspreet Walia and Fabio Variola and Andr{\'e} Staudte and Chunmei Zhang and Jakubek, {Zygmunt J.} and Corkum, {P. B.}",

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doi = "10.1364/OE.389215",

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T1 - Multiphoton laser-induced confined chemical changes in polymer films

AU - Kallepalli, Deepak L.N.

AU - Godfrey, Alan T.K.

AU - Walia, Jaspreet

AU - Variola, Fabio

AU - Staudte, André

AU - Zhang, Chunmei

AU - Jakubek, Zygmunt J.

AU - Corkum, P. B.

PY - 2020/4/13

Y1 - 2020/4/13

N2 - We report ultrafast-laser-induced photochemical, structural, and morphological changes in a polyimide film irradiated at the polymer-glass interface in back-incident geometry. Back-illumination creates locally hot material at the interface leading to a confined photochemical change at the interface and a morphological change through a blister formation. The laser-induced photochemical changes in polyimide resulted in new absorption and luminescence properties in the visible region. The laser-treated polyimide exhibited photoluminescence anisotropy resulting from formation of ordered polymer upon irradiation by linearly polarized ultrashort laser pulses. Confocal fluorescence microscopy resulted in similar observations to the bulk. Reflection-absorption infrared spectroscopy and X-ray photoelectron spectroscopy together indicated confinement of laser-induced chemical changes at the interface.

AB - We report ultrafast-laser-induced photochemical, structural, and morphological changes in a polyimide film irradiated at the polymer-glass interface in back-incident geometry. Back-illumination creates locally hot material at the interface leading to a confined photochemical change at the interface and a morphological change through a blister formation. The laser-induced photochemical changes in polyimide resulted in new absorption and luminescence properties in the visible region. The laser-treated polyimide exhibited photoluminescence anisotropy resulting from formation of ordered polymer upon irradiation by linearly polarized ultrashort laser pulses. Confocal fluorescence microscopy resulted in similar observations to the bulk. Reflection-absorption infrared spectroscopy and X-ray photoelectron spectroscopy together indicated confinement of laser-induced chemical changes at the interface.

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DO - 10.1364/OE.389215

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SP - 11267

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JO - Optics Express

JF - Optics Express

IS - 8

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Multiphoton laser-induced confined chemical changes in polymer films

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