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

介电常数周期性变化的三维光子晶体可以形成抵抗电磁波的带隙，这些人造晶体可以完全反射光或微波。众所周知，半导体中晶体电势的周期性变化形成了电子带隙。在我们的研究中，我们成功地制造了具有陶瓷分散环氧树脂晶格的毫米级光子晶体。二氧化钛/环氧树脂晶格的金刚石结构人们认为，具有金刚石结构对称性的光子晶体可以在各个方向上形成完美的 bangap。首先，使用个人计算机通过 CAD 程序设计光子晶体的结构。将结构设计切成一组薄片并转换为数字代码（STL 数据），然后将其传输到立体光刻机，然后通过 UV 在光敏液体树脂上形成二维层。 -激光扫描，并根据STL数据重复层形成建立三维结构，利用该CAD/CAM过程根据电磁理论修改晶格结构，获得具有分级晶格间距的金刚石光子晶体。通过引入梯度晶格结构的层缺陷，开发了一种新型宽带隙电磁波滤波器，随后加工出具有金刚石结构的毫米级气孔路径。这些被称为反金刚石晶体的样品被证实可以完美地反射所有方向的电磁波，预计光子晶体和晶格修改将在电信系统、高性能定向领域得到广泛应用。未来智能交通系统的天线和电磁干扰屏障。