AI Article Synopsis
- - The study explores the laser-induced damage threshold (LIDT) of various nematic liquid crystal mixtures using femtosecond laser pulses, with a focus on real-time monitoring through spectral-domain interferometry.
- - Different laser pulse durations (from 180 fs to 1.8 ps) and repetition rates (up to 1 MHz) reveal that the LIDT is influenced by ionization at lower rates and linear absorption at higher rates.
- - The research finds that LIDTs exceeding 1 for all three liquid crystal mixtures (MLC2073, MLC2132, and E7), and also examines the LIDT of polyvinyl alcohol using the same techniques.
Article Abstract
The laser-induced damage threshold (LIDT) of nematic liquid crystals is investigated in the femtosecond regime at ≃1030. The thickness and breakdown of freely suspended thin films (≃100) of different mixtures (MLC2073, MLC2132, and E7) is monitored in real time by spectral-domain interferometry. The duration of laser pulses was varied from 180 fs to 1.8 ps for repetition rates ranging from single shot to 1 MHz. The dependence of the LIDT with pulse duration suggests a damage mechanism dominated by ionization mechanisms at low repetition rate and by linear absorption at high repetition rate. In the single-shot regime, LIDTs exceeding 1/ are found for the three investigated mixtures. The LIDT of polyvinyl alcohol is also investigated by the same method.
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| http://dx.doi.org/10.1364/AO.436236 | DOI Listing |
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