Linear and third-order optical characterisation of polyDPCHD

被引:7
作者
D'Amore, F
Pietralunga, SM
Martinelli, M
Alloisio, M
Cavallo, D
Cuniberti, C
Dell'Erba, C
Dellepiane, G
机构
[1] CORECOM, I-20131 Milan, Italy
[2] Politecn Milan, Dipartimento Elettron & Informat, I-20133 Milan, Italy
[3] Univ Genoa, INFM, INSTM, I-16146 Genoa, Italy
[4] Univ Genoa, Dipartimento Chim & Chim Ind, I-16146 Genoa, Italy
关键词
polydiacetylenes; ellipsometry; THG; third-order non-linearity;
D O I
10.1016/S0379-6779(02)01297-3
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We report here on linear and non-linear optical characterisation of the polydiacetylene poly[ 1,6-bis(3,6-dipalmitoyl-N-carbazolyl)-2,4-hexadiyne] (polyDPCHD). Thin films (14 and 32 nm) of good optical quality have been obtained by deposition of the monomer from chloroform solutions on glass by standard spin-coating technique, followed by thermal polymerisation at 115 degreesC. Complex index of refraction of a thin film deposited on a I mm thick fused silica substrate has been determined in the spectral range from 270 to 1700 nm by ellipsometry. Third-order optical susceptibility (X-(3)) has been measured by Third Harmonic Generation (THG) technique on a thin polyDPCHD film deposited on a 160 mum thick BK7 substrate in the spectral range from 1000 to 1900 nm, using the Maker fringes method. The X-(3) dispersion shows the typical resonant behaviour due to multi-photon processes and is strictly related to the absorption spectra in the visible range. Values of X-(3) of the order of magnitude of 10(-11) esu have been obtained. A comparison between linear and non-linear optical properties of polyDPCHD and poly[ 1,6-bis(3,6-dihexaedcyl-N-carbazolyl)-2,4-hexadiyne] polyDCHD-HS will be presented. (C) 2003 Elsevier Science B.V. All rights reserved.
引用
收藏
页码:363 / 367
页数:5
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