Second harmonic generation from trinitro-substituted subphthalocyanines films: Evidence of noncentrosymmetric molecular organization
作者:
G. Rojo,
A. Hierro,
M. A. Di´az-Garcia,
F. Agullo´-Lopez,
B. del Rey,
A. Sastre,
T. Torres,
期刊:
Applied Physics Letters
(AIP Available online 1997)
卷期:
Volume 70,
issue 14
页码: 1802-1804
ISSN:0003-6951
年代: 1997
DOI:10.1063/1.118696
出版商: AIP
数据来源: AIP
摘要:
Second-harmonic generation from &lgr;=1.06 &mgr;m fundamental light has been measured in both evaporated and spin-coated films of trinitro-substituted subphthalocyanines. Ordering of these noncentrosymmetric molecules with the dipole moment perpendicular to the film face has been achieved either by the deposition process (evaporated samples) or by corona poling (spin-coated samples). The second-order susceptibilities&khgr;31(2)=2.36×10−9esu (for vacuum evaporated samples) and&khgr;31(2)=9.62×10−10–1.14×10−9esu (for poled spin-coated samples) have been determined by comparison with anX-cutLiNbO3crystal used as reference. ©1997 American Institute of Physics.
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