Fabrication of serially-grafted optical wave guide of organic functional crystal and polymer

有机功能晶体与聚合物串联接枝光波导的制备

基本信息

批准号：
13450025
负责人：
KAINO Toshikuni
金额：
$ 9.66万
依托单位：
Tohoku University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2003
项目状态：
已结题

项目摘要

Organic crystal optical waveguides are promising device for practical photonic applications though because of their large optical loss, they should be serially grafted with transparent polymer waveguides. Among a variety of organic crystals we investigated an organic salt, 4-N, N-dimethylamino-4'-N-methyl-stilbazorium tosylate, DAST, an a promising functional crystal. It is of particular interest because its largest NLO coefficient d_<11> is 〜540V and electro-optic (EO) coefficient r_<11> is 〜55pm/V (λ=1.54μm). DAST crystal is relatively hard to fabricate optical waveguide because it is very easy to dissolve into organic solvents as well as in water. This is very critical because the selection of the waveguide fabrication methods will be limited.So we had used special lift off method to fabricate a serially grafted optical waveguide of DAST and transparent polymer. Based on the photolithography and reactive ion etching technology, we had succeeded to fabricate a serially grafted struct … More ure of the waveguide, for the first time as far as the combined waveguide of crystal and polymer. As far as NLO organic crystal waveguide concerns, only two molecular crystals that are usually insoluble in water were reported, though their loss was large, larger than 20dB/cm. In the case of the DAST, loss was around 10dB/cm and 〜6dB/cm with serially grafted structure of 5 mm long DAST. DAST serially grafted waveguide was also fabricated using photobleaching. We had already reported that the DAST crystal is photo-bleachable based on photo-isomerization and photodecomposition. So as a polymer waveguide, we had selected azobenzene-dye containing transparent polymer to photobleach. After synthesizing novel polyarylether with azo-dye, we have fabricated a serially grafted waveguide of DAST and the polyarylether. We had succeeded to fabricate it using this simple photobleaching technology.In conclusion, a serially grafted organic functional crystal and transparent polymer was successfully fabricated for the time as far as we know. The waveguide of the DAST crystal and polymer is expected to apply for functional optical circ in optical telecommunication system. Less

有机晶体光波导是一种有前景的实际光子应用器件，但由于其光学损耗较大，因此应与透明聚合物波导连续接枝。在各种有机晶体中，我们研究了有机盐，4-N,N-二甲氨基-4。 '-N-甲基-芪苯磺酸盐，DAST，一种有前途的功能晶体，它特别令人感兴趣，因为它的最大非线性光学系数 d_<11> 约为 540V 和电光。 (EO)系数r_<11>为~55pm/V(λ=1.54μm)，DAST晶体相对难以制造光波导，因为它很容易溶解在有机溶剂和水中，这是非常关键的。因此，我们采用特殊的剥离方法，基于光刻和反应离子刻蚀技术，制备了DAST和透明聚合物的串联接枝光波导。成功制造了连续接枝结构的波导，首次将晶体和聚合物组合在一起的波导。就 NLO 有机晶体波导而言，仅报道了两种通常不溶于水的分子晶体。，尽管它们的损耗很大，大于 20dB/cm。在 DAST 的情况下，损耗约为 10dB/cm，对于 5 mm 长的 DAST 的串联接枝结构，损耗约为 6dB/cm。 DAST连续接枝波导也采用光漂白的方法制备。我们已经报道了基于光异构化和光分解的DAST晶体是可光漂白的，因此我们选择了含有透明聚合物的偶氮苯染料来进行光漂白。新型聚芳醚与偶氮染料，我们已经成功地制造了 DAST 和聚芳醚的连续接枝波导。总之，据我们所知，目前已成功制备出连续接枝有机功能晶体和透明聚合物的波导，有望应用于光通信系统中的功能光学电路。