%0 Journal Article
%T Three-Photon Absorption and Upconversion Fluorescence Properties of Series 1,3,4-Oxadiazole Derivatives
%A HUANG Wei
%A LU Chang-Gui
%A QIAN Ying
%A LIU Chang
%A WANG Zhu-Yuan
%A CUI Yi-Ping
%A <br>黄维
%A 吕昌贵
%A 钱鹰
%A 刘畅
%A 王著元
%A 崔一平
%J 中国物理快报
%D 2008
%I 
%X A newly synthesized 1,3,4-oxadiazole derivatives have been studied using a femtosecond Ti：sapphire laser system. The series molecules present strong three-photon absorption and frequency upeonversion fluorescence at wavelengths from 1205 nm to 1575 nm. Furthermore, there is no proportional relationship between three-photon absorption cross sections and the chemical structure transformation from monomer, dimer to trimer. Effective charge-transfer distance by π-conjugation bonds may be the contributing factor. In the experimental design, the far-field intensity distribution of femtosecond laser beam has been taken into account. We give the optimized analytical solution of nonlinear transmission in a three-photon absorption （3PA ） process when the incident beam has a Gaussian transverse spatial profile.
%K 42
%K 65
%K Ky
%K 33
%K 50
%K Dq
%K 42
%K 70
%K Jk<br>上变频
%K 光子吸收
%K 荧光分析
%K 物理学
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=E27DA92E19FE279A273627875A70D74D&aid=A818CCC351B4A15FFD0B7A80DBB20B53&yid=67289AFF6305E306&vid=C5154311167311FE&iid=38B194292C032A66&sid=3A9B6DFDAB34D091&eid=1BE4748776BF02C4&journal_id=0256-307X&journal_name=中国物理快报&referenced_num=0&reference_num=16