Photorefractive effect in a photoconductive electro‐optic carbazole trimer
作者:
Liming Wang,
Yadong Zhang,
Tatsuo Wada,
Hiroyuki Sasabe,
期刊:
Applied Physics Letters
(AIP Available online 1996)
卷期:
Volume 69,
issue 6
页码: 728-730
ISSN:0003-6951
年代: 1996
DOI:10.1063/1.117872
出版商: AIP
数据来源: AIP
摘要:
We present an experimental study of the photorefractive effect in a multifunctional carbazole trimer sensitized with 2,4,7‐trinitro‐9‐fluorenone. The trimer consists of a central carbazole ring which is conjugated with two 6‐dicyanovinylcarbazoles through ethynylene groups. It exhibits intrinsically photocarrier transporting, electro‐optic, film‐forming, and room‐temperature poling properties. Photorefractive effect at a wavelength of 633 nm was demonstrated by measuring the phase shift of refractive index and asymmetric energy transfer in a two‐beam coupling experiment. A large net photorefractive gain coefficient (&Ggr;‐&agr;) of 76/cm was obtained in a sensitizer‐optimized material. A four‐wave mixing experiment was carried out to measure the magnitude of index modulation and dynamics of the grating formation. ©1996 American Institute of Physics.
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