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 language | English (US) |
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Pages | 145-146 |
Number of pages | 2 |
State | Published - Dec 1 1990 |
Event | First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90 - Kauai, HI, USA Duration: Jul 16 1990 → Jul 20 1990 |
Other
Other | First International Meeting on Nonlinear Optics: Materials, Phenomena and Devices - NLO '90 |
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City | Kauai, HI, USA |
Period | 7/16/90 → 7/20/90 |
All Science Journal Classification (ASJC) codes
- Engineering(all)