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

有机晶体光学波导是实用光子应用的有前途的设备，尽管它们的光学损失较大，因此应与透明的聚合物波导连续移植。在各种有机晶体中，我们研究了有机盐，4-N，N-二甲基氨基-4'-N-甲基 - 甲基 - 甲基甲酸酯，Dast，一种有希望的功能晶体。这是特别令人感兴趣的，因为其最大的NLO Financial D_ <11>为〜540V，Electro-Optic（EO）系数R_ <11>为〜55pm/v（λ=1.54μm）。 Dast Crystal相对难以制造光学波导，因为它很容易溶于有机溶剂和水中。这是非常关键的，因为选择波导制造方法将受到限制。因此，我们使用了特殊的升降方法来制造Dast和透明聚合物的串行移植光学波导。基于光刻和反应性离子蚀刻技术，我们成功地制造了一个串行移植的结构……首次就晶体和聚合物的波导构成了波导。就NLO有机晶体波导的问题而言，据报道，只有两个通常在水中不溶于水的分子晶体，尽管它们的损失很大，大于20dB/cm。在DAST的情况下，损耗10dB/cm和〜6dB/cm，长度为5 mm的串行结构。还使用光漂白制造了Dast串行移植的波导。我们已经报道说，基于光的异构化和光子分解，Dast Crystal是可以拍摄的。因此，作为聚合物波导，我们选择了含有透明聚合物的偶氮苯二氧化物来光泽。在将新颖的偶氮与偶氮染色合成后，我们制造了串行的Dast和多亚叶中的串行移植波导。我们已经成功地使用了这种简单的光漂白技术来制造它。总之，据我们所知，在当时成功制造了一种串行移植的有机晶体和透明聚合物。 DAST晶体和聚合物的波导预计将在光学电信系统中申请功能性光电。较少的