Phase conjugation in amorphous germanium diselenide thin films
作者:
M. Ferna´ndez Guasti,
E. Haro Poniatowski,
S. Camacho Lo´pez,
期刊:
Applied Physics Letters
(AIP Available online 1991)
卷期:
Volume 58,
issue 11
页码: 1137-1139
ISSN:0003-6951
年代: 1991
DOI:10.1063/1.104395
出版商: AIP
数据来源: AIP
摘要:
We report a phase conjugate mirror (PCM) using germanium diselenide amorphous thin films with a 25 mW He Ne laser. The size of the PCM area can be made very large as opposed to the size limitations of crystal PCMs. The induced hologram may be recorded temporarily or permanently depending on the incident light parameters. The main drawback of this system is the long exposure time, of the order of minutes, required to generate the phase conjugate signal. The modulation of the refractive index is suggested to be due to a photostructural reorientation.
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