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

I. C. 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

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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    Khoo, I. C., 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, .