The Marangoni effect in nematic liquid crystals due to a Gaussian light beam absorption

Poursamad, J. B.; Jahanbakhsh, Fatemeh; Asadpour, Mohammad; Phirouznia, A.

doi:10.1016/j.molliq.2013.03.017

Cited by 7 publications

(2 citation statements)

References 9 publications

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“…According to the Marangoni mechanism, this forces convection movements in the film which reduces the inner thickness until it breaks. Marangoni effect has been observed in LC under thermal changes due to laser absorption in LC films deposited on a solid substrate [30].…”

Section: Damage Detectionmentioning

confidence: 99%

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

et al. 2021

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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 ( 100 nm) of different mixtures (MLC2073, MLC2132 and E7) is monitored in real time by spectraldomain 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/cm 2 are found for the three investigated mixtures. The LIDT of polyvinyl alcohol (PVA) is also investigated by the same method.

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Section: Damage Detectionmentioning

confidence: 99%

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

et al. 2021

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“…It was shown that the response of the LCs to the optical fields increase in the presence of proper dopants [9,10]. Light induced thermal [11][12][13], conformational [14], heat-flow [15,16], surface-driven [17][18][19][20][21], thermomechanical [22][23][24], and photorefractive [25] effects give rise to large optical nonlinearities.…”

Section: Introductionmentioning

confidence: 99%

Optical Nonlinearity of Liquid Crystals in the Presence of Chained Ferroelectric Nanoparticles

Poursamad

Emdadi

2019

Acta Phys. Pol. A

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A nematic liquid crystal cell doped with spherical ferroelectric nanoparticles is studied in the high frequency regime. Optical permittivity of the host nematic liquid crystal in the presence of chained ferroelectric nanoparticles, birefringence and optical Freedericksz transition threshold of the suspension are discussed theoretically. The director reorientation of doped nematic liquid crystal is due to the simultaneous presence of the oblique incidence of a light beam and external applied magnetic field in the small director reorientation approximation. Also, optical nonlinearity of the medium is analytically calculated here. The obtained optical nonlinearity is in the range of supra-nonlinearity.

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Dispersion of multiferroic BiFeO3 nanoparticles in nematic liquid crystals

et al. 2019

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The Marangoni effect in nematic liquid crystals due to a Gaussian light beam absorption

Cited by 7 publications

References 9 publications

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

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

Optical Nonlinearity of Liquid Crystals in the Presence of Chained Ferroelectric Nanoparticles

Dispersion of multiferroic BiFeO3 nanoparticles in nematic liquid crystals

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