標題: Acousto-optical effect induced by ultrasound pulses in a nematic liquid-crystal film
作者: Lee, W
Chen, SH
光電工程學系
Department of Photonics
公開日期: 1-四月-2001
摘要: 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. (C) 2001 Optical Society of America.
URI: http://hdl.handle.net/11536/29719
ISSN: 0003-6935
期刊: APPLIED OPTICS
Volume: 40
Issue: 10
起始頁: 1682
結束頁: 1685
顯示於類別:期刊論文


文件中的檔案:

  1. 000167839800014.pdf