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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Vol. 40, Iss. 10 — Apr. 1, 2001
  • pp: 1682–1685

Acousto-Optical Effect Induced by Ultrasound Pulses in a Nematic Liquid-Crystal Film

Wei Lee and Shu-Hsia Chen  »View Author Affiliations


Applied Optics, Vol. 40, Issue 10, pp. 1682-1685 (2001)
http://dx.doi.org/10.1364/AO.40.001682


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Abstract

The reorientation of the director of a homeotropically aligned nematic liquid-crystal film subjected to ultrasound pulses is discussed. The relationship is investigated for the first time, to our knowledge, between the transmitted optical power and the high-frequency (approximately megahertz) pulsed ultrasound intensity. It is evident that there exists a power law governing the ultrasound-intensity-dependent optical transmission. However, the data indicate no existence of a characteristic threshold for the acousto-optical effect. Our results suggest that acoustic streaming, known to be responsible for acousto-optical effects in cw ultrasound experiments, should also play a similarly important role in the case involving a pulsed ultrasound field.

© 2001 Optical Society of America

OCIS Codes
(160.1050) Materials : Acousto-optical materials
(160.3710) Materials : Liquid crystals

Citation
Wei Lee and Shu-Hsia Chen, "Acousto-Optical Effect Induced by Ultrasound Pulses in a Nematic Liquid-Crystal Film," Appl. Opt. 40, 1682-1685 (2001)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-40-10-1682


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References

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