Mr. Loïc Ramousse Profile

Loïc Ramousse

at Institut de Physique de Nice CNRS UMR 7010

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Proceedings Article | 12 October 2021 Poster + Presentation

Femtosecond laser-induced damage threshold of nematic liquid crystals at 1030 nm.

Loïc Ramousse, Gilles Chériaux, Cyrille Claudet, Aurélie Jullien

Proceedings Volume 11910, 119101B (2021) https://doi.org/10.1117/12.2598018

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The laser-induced damage threshold (LIDT) of nematic liquid crystals is investigated in the femtosecond regime at 1030 nm. The thickness and breakdown of freely-suspended thin films (approximately 100 nm) 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 J/cm² are found for the three investigated mixtures.

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