Fabrication of Dielectric Ceramic/polymer Photonic Crystals and Application to Microwave Devices.

介电陶瓷/聚合物光子晶体的制造及其在微波器件中的应用。

基本信息

批准号：
11305046
负责人：
MIYAMOTO Yoshinari
金额：
$ 27.13万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1999
资助国家：
日本
起止时间：
1999 至 2001
项目状态：
已结题

项目摘要

Three-dimensional photonic crystals with periodic variations in dielectric constant can form the bandgap against electromagnetic waves. These artificial crystals can totally reflect a light or a microwave. It is well known that the periodic variation of crystal potential in semiconductors forms the electronic bandgap by three dimensional scattering of electron waves associated with Bragg reflection. In our investigation., the millimeter Order photonic crystals with ceramic dispersed epoxy lattices were processed by stereolithography. We have succeeded in fabrication of a diamond structure of the titania/epoxy lattice. It is believed that the photonic crystal with the symmetry of diamond structure can form a perfect bangap in all directions. Firstly, the structure of a photonic crystal is designed with a CAD program using a personal computer. The structure design is sliced to a set of thin sections and converted to a numerical code (STL data) which is transferred to a stereolithographic … More machine. Then, it forms a two-dimensional layer on photo-sensitive liquid resin by UV-laser scanning, and builds up to a three-dimensional structure by repeating layer formations based on the STL data. The lattice structures were modified according to electromagnetic theories by utilizing this CAD/CAM process. The diamond photonic crystal with graded lattice spacings was fabricated to obtain the wide bandgap. A new type of electromagnetic wave filter was developed by introducing the layer defect for the graded lattice structure. Subsequently, millimeter order air hole paths with the diamond structure were processed into a dielectric balks. These samples named the inverse diamond crystal were verified to reflect the electromagnetic wave for all directions perfectly. The engineering of photonic crystals and lattice modifications is expected to lead to many applications in telecommunication systems ; compact wave guides, high performance directional antennas for future intelligent transportation systems, and barriers against electromagnetic interference. Less

线性常数线性变化周期性变化的三维光子晶体可以在电子波上形成带隙。这些人造晶体可以完全反射光或微波炉。众所周知，半导体中晶体电位的周期性变化通过与布拉格反射相关的电子波的三维散射形成电子带隙。在我们的研究中，通过立体光刻处理了具有陶瓷分散环氧晶格的毫米级光子晶体。我们成功地制造了二氧化钛/环氧晶格的钻石结构。据信，具有钻石结构对称性的光子晶体可以在各个方向形成完美的bangap。首先，光子晶体的结构是使用个人计算机的CAD程序设计的。结构设计将其切成一组薄层，并转换为数值代码（STL数据），该代码将转移到立体光刻……更多机器。然后，它通过紫外线扫描在对光敏液体树脂上形成二维层，并通过基于STL数据重复层的地层来建立至三维结构。通过使用此CAD/CAM工艺，根据电磁理论对晶格结构进行了修改。制造具有分级晶格间距的钻石光子晶体以获得宽带盖。通过引入分级晶格结构的层缺陷，开发了一种新型的电磁波滤波器。随后，将带有钻石结构的毫米级气孔路径加工成顽固的球。这些称为逆钻石晶体的样品被验证，以完美地反映电磁波。预计光子晶体和晶格修饰的工程将导致电信系统中的许多应用。紧凑的波浪指南，未来智能运输系统的高性能定向天线以及抗电磁干扰的障碍。较少的