Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals

Iam-choon Khoo, R. R. Michael, R. G. Lindquist, R. J. Mansfield, P. LoPresti

Research output: Contribution to conferencePaper

Abstract

Nonlinear light scatterings in the mesophases of liquid crystals with nanosecond laser pulses have demonstrated the possibility of inducing large refractive index changes associated wtih photo-induced fluctuations in density, temperature, and director-axis orientations. High-frequency acoustic waves, with periods on the order of a few nanoseconds, have also been observed. The results of a study which used picosecond laser pulses to unambiguously create and measure these nonlinear effects associated with thermoelastic, electrostrictive, and dipolar interactions and their dynamics are reported. A quantitative theory based on solving the full hydrodynamically coupled equations for the density and temperature changes, an Erickson-Leslie type of equation for the laser-induced director-axis reorientation, and the hydrodynamic equation for the flow phenomenon is also presented.

Original languageEnglish (US)
Pages145-146
Number of pages2
StatePublished - Dec 1 1990
EventFirst International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90 - Kauai, HI, USA
Duration: Jul 16 1990Jul 20 1990

Other

OtherFirst International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90
CityKauai, HI, USA
Period7/16/907/20/90

Fingerprint

Liquid crystals
Laser pulses
Lasers
Light scattering
Refractive index
Hydrodynamics
Acoustic waves
Temperature

All Science Journal Classification (ASJC) codes

  • Engineering(all)

Cite this

Khoo, I., Michael, R. R., Lindquist, R. G., Mansfield, R. J., & LoPresti, P. (1990). Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals. 145-146. Paper presented at First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90, Kauai, HI, USA, .
Khoo, Iam-choon ; Michael, R. R. ; Lindquist, R. G. ; Mansfield, R. J. ; LoPresti, P. / Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals. Paper presented at First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90, Kauai, HI, USA, .2 p.
@conference{82891d45f02c4555af9861bda23eccd2,
title = "Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals",
abstract = "Nonlinear light scatterings in the mesophases of liquid crystals with nanosecond laser pulses have demonstrated the possibility of inducing large refractive index changes associated wtih photo-induced fluctuations in density, temperature, and director-axis orientations. High-frequency acoustic waves, with periods on the order of a few nanoseconds, have also been observed. The results of a study which used picosecond laser pulses to unambiguously create and measure these nonlinear effects associated with thermoelastic, electrostrictive, and dipolar interactions and their dynamics are reported. A quantitative theory based on solving the full hydrodynamically coupled equations for the density and temperature changes, an Erickson-Leslie type of equation for the laser-induced director-axis reorientation, and the hydrodynamic equation for the flow phenomenon is also presented.",
author = "Iam-choon Khoo and Michael, {R. R.} and Lindquist, {R. G.} and Mansfield, {R. J.} and P. LoPresti",
year = "1990",
month = "12",
day = "1",
language = "English (US)",
pages = "145--146",
note = "First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90 ; Conference date: 16-07-1990 Through 20-07-1990",

}

Khoo, I, Michael, RR, Lindquist, RG, Mansfield, RJ & LoPresti, P 1990, 'Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals', Paper presented at First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90, Kauai, HI, USA, 7/16/90 - 7/20/90 pp. 145-146.

Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals. / Khoo, Iam-choon; Michael, R. R.; Lindquist, R. G.; Mansfield, R. J.; LoPresti, P.

1990. 145-146 Paper presented at First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90, Kauai, HI, USA, .

Research output: Contribution to conferencePaper

TY - CONF

T1 - Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals

AU - Khoo, Iam-choon

AU - Michael, R. R.

AU - Lindquist, R. G.

AU - Mansfield, R. J.

AU - LoPresti, P.

PY - 1990/12/1

Y1 - 1990/12/1

N2 - Nonlinear light scatterings in the mesophases of liquid crystals with nanosecond laser pulses have demonstrated the possibility of inducing large refractive index changes associated wtih photo-induced fluctuations in density, temperature, and director-axis orientations. High-frequency acoustic waves, with periods on the order of a few nanoseconds, have also been observed. The results of a study which used picosecond laser pulses to unambiguously create and measure these nonlinear effects associated with thermoelastic, electrostrictive, and dipolar interactions and their dynamics are reported. A quantitative theory based on solving the full hydrodynamically coupled equations for the density and temperature changes, an Erickson-Leslie type of equation for the laser-induced director-axis reorientation, and the hydrodynamic equation for the flow phenomenon is also presented.

AB - Nonlinear light scatterings in the mesophases of liquid crystals with nanosecond laser pulses have demonstrated the possibility of inducing large refractive index changes associated wtih photo-induced fluctuations in density, temperature, and director-axis orientations. High-frequency acoustic waves, with periods on the order of a few nanoseconds, have also been observed. The results of a study which used picosecond laser pulses to unambiguously create and measure these nonlinear effects associated with thermoelastic, electrostrictive, and dipolar interactions and their dynamics are reported. A quantitative theory based on solving the full hydrodynamically coupled equations for the density and temperature changes, an Erickson-Leslie type of equation for the laser-induced director-axis reorientation, and the hydrodynamic equation for the flow phenomenon is also presented.

UR - http://www.scopus.com/inward/record.url?scp=0025541542&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0025541542&partnerID=8YFLogxK

M3 - Paper

AN - SCOPUS:0025541542

SP - 145

EP - 146

ER -

Khoo I, Michael RR, Lindquist RG, Mansfield RJ, LoPresti P. Picosecond laser-induced reorientation, density, temperature, and flow effects in the mesophases of liquid crystals. 1990. Paper presented at First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90, Kauai, HI, USA, .