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Title: Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications

Abstract

We investigate the damage resistance of saturated and unsaturated liquid crystals (LC’s) under a wide range of laser excitation conditions, including 1053-nm pulse durations between 600 fs and 1.5 ns and nanosecond pulse excitation at 351 nm and 532 nm. This study explores the relationship between the LC’s resistance to laser-induced breakdown (damage) and the electronic structure (pi-electron delocalization) of the constituent molecules. The laser-induced damage threshold at all wavelengths and pulse durations was consistently higher in saturated materials than in their unsaturated counterparts. The wavelength’s dependence in the results suggests that the energy coupling process that leads to laser-induced breakdown is governed by the energy separation between the ground state and the first and second excited states, while the pulse duration’s dependence in the results reveals the important role of electron relaxation between the excited states. A qualitative description was developed to interpret the experimental observations.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Laboratory for Laser Energetics, University of Rochester
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
Contributing Org.:
Laboratory for Laser Energetics, University of Rochester
OSTI Identifier:
1574234
Report Number(s):
2019-224, 2489, 1531
Journal ID: ISSN 2045-2322; 2019-224, 2489, 1531
Grant/Contract Number:  
NA0003856
Resource Type:
Accepted Manuscript
Journal Name:
Scientific Reports
Additional Journal Information:
Journal Volume: 9; Journal Issue: 1; Journal ID: ISSN 2045-2322
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Citation Formats

Kosc, T. Z., Kozlov, A. A., Papernov, S., Kafka, K. R. P., Marshall, K. L., and Demos, S. G. Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications. United States: N. p., 2019. Web. doi:10.1038/s41598-019-52305-3.
Kosc, T. Z., Kozlov, A. A., Papernov, S., Kafka, K. R. P., Marshall, K. L., & Demos, S. G. Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications. United States. doi:10.1038/s41598-019-52305-3.
Kosc, T. Z., Kozlov, A. A., Papernov, S., Kafka, K. R. P., Marshall, K. L., and Demos, S. G. Mon . "Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications". United States. doi:10.1038/s41598-019-52305-3.
@article{osti_1574234,
title = {Investigation of parameters governing damage resistance of nematic liquid crystals for high-power or peak-intensity laser applications},
author = {Kosc, T. Z. and Kozlov, A. A. and Papernov, S. and Kafka, K. R. P. and Marshall, K. L. and Demos, S. G.},
abstractNote = {We investigate the damage resistance of saturated and unsaturated liquid crystals (LC’s) under a wide range of laser excitation conditions, including 1053-nm pulse durations between 600 fs and 1.5 ns and nanosecond pulse excitation at 351 nm and 532 nm. This study explores the relationship between the LC’s resistance to laser-induced breakdown (damage) and the electronic structure (pi-electron delocalization) of the constituent molecules. The laser-induced damage threshold at all wavelengths and pulse durations was consistently higher in saturated materials than in their unsaturated counterparts. The wavelength’s dependence in the results suggests that the energy coupling process that leads to laser-induced breakdown is governed by the energy separation between the ground state and the first and second excited states, while the pulse duration’s dependence in the results reveals the important role of electron relaxation between the excited states. A qualitative description was developed to interpret the experimental observations.},
doi = {10.1038/s41598-019-52305-3},
journal = {Scientific Reports},
number = 1,
volume = 9,
place = {United States},
year = {2019},
month = {11}
}

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