Studies of fabrication of Perfect Photonic Band Crystals and Optics of the Photonic Crystals by using Innovative High Refractive Index Materials and Advanced Self-assembly

利用创新高折射率材料和先进自组装技术制造完美光子带晶体和光子晶体光学的研究

基本信息

批准号：
23750152
负责人：
SOGOSHI Norihito
金额：
$ 3万
依托单位：
The University of Electro-Communications
依托单位国家：
日本
项目类别：
Grant-in-Aid for Young Scientists (B)
财政年份：
2011
资助国家：
日本
起止时间：
2011 至 2012
项目状态：
已结题

项目摘要

We studied the inverse opal photonic structure made of high refractive index above 3.0. The perfect photonic stop band was observed, and is applicable to innovative photonic devices.The artificial opals, which are obtained by arraying colloidal particles with well-defined diameters, are the possible candidate of perfect photonic crystals. The interstitial voids were filled with high-refractive index materials using the inverse opal method improved by us. This method allows us to fabricate virtually any kind of materials tobe filled in the template artificial opals.We made several trials to deposit the inverse opals with metal oxide with a high refractive index.The one is the electrodeposition from electrolyte solution containing desired metal cations onto the electrode with the artificial opal structure. The deposited inverse opalline film composed of Cu2O with as highrefractive index as above 3 was obtained. We confirmed the well developed photonic band gap occurred in this film.The r … More esult remains preliminary, but reveals the high refractive index inverse opals are promising. The future result will be the ones applicable to photonic devices.Another trials was to deposit the film from metal-alchoxide solutions using dehydrosys reactions. This method is highly desirable since the nearly arbitrary combination of metal-oxides enables the design fascility. This approach is promising, and yet to be studied.The photonic structure obtained by the first approach showed the wide photonic stop band of longer than 100 nm, and the extinction ratio more than 100, when the transmittance inside and outside the stop band was compared.As the parallel project, we studied the colloidal particle mixed with discotic liquid crystals, which exhibits the hierarchy self-assemble architecture. The purpose of this study is aligned nanowire constructed in host semiconducting organic materials.A chain composed of Au nanoparticles are aligned with self-ordering discotic liquid crystals. The photo-induced charge transfer from semiconducting liquid crystalline molecule HAT6 to Au nanowire was observed. This results indicate the efficient charge separation using nanowire as a nano-comb electrode is promising.The results were reported on the annual conference of the Japanese Society of Chemistry on the lastMarch. Less

我们研究了由高折射率制成的反蛋白石光子结构，观察到了完美的光子阻带，并且适用于创新的光子器件。通过排列具有明确直径的胶体颗粒获得的人造蛋白石是最理想的。使用我们改进的反蛋白石方法，间隙空隙被填充，这种方法几乎可以制造任何类型的材料。我们做了几次尝试，用高折射率的金属氧化物沉积反蛋白石。一种是从含有所需金属阳离子的电解质溶液中电沉积到具有人造蛋白石结构的电极上。我们得到了由 Cu2O 组成的薄膜，其折射率与上述 3 一样高，我们证实了该薄膜中存在良好的光子带隙。结果仍是初步的，但揭示了高折射率。未来的结果将是适用于光子器件的。另一个试验是使用脱水反应从金属醇盐溶液中沉积薄膜，这种方法是非常理想的，因为金属氧化物的几乎任意组合都可以实现。这种方法很有前景，但还有待研究。第一种方法获得的光子结构显示出大于100 nm的宽光子阻带，当透射率大于100时，消光比大于100。作为平行项目，我们研究了与盘状液晶混合的胶体颗粒，其表现出层次自组装结构。本研究的目的是在主体半导体有机材料中构建定向纳米线。由 Au 纳米颗粒组成的链与自排序盘状液晶对齐，观察到从半导体液晶分子 HAT6 到 Au 纳米线的光诱导电荷转移。这一结果表明使用纳米线可以实现有效的电荷分离。作为纳米梳状电极，前景广阔。去年3月的日本化学会年会上报道了这一结果。