Novel Interactions of Materials with Radiation Field in Photonic Cystals

光子晶体中材料与辐射场的新颖相互作用

基本信息

批准号：
07404049
负责人：
INOUE Kuon
金额：
$ 4.48万
依托单位：
HOKAIDO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A)
财政年份：
1995
资助国家：
日本
起止时间：
1995 至 1997
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07404049/
关键词：
photonic crystal photonic band gap radiation field photon mode field control 2D crystal laser action フォトンモード複合誘電体格子二次元結晶

项目摘要

We Succeeded for the first time in fabricating Such a 2D photonic crystal with the lattice constant on the order of 1mum as having a common 2D photonic band gap for H-polarization. We have revealed experimentally the unique optical properties Which include the existence of the uncoupled modes that can not couple to the external plane wave, anomalous excitation-wavelength-dependent spectra of 0-th-to-3rd order Bragg reflected intensities that are another manifestation of physical property of the respective photonic bands, and emission spectra from a small amount of molecules placed in a 2D photonic lattice that reflect also the density of the present photon states.We found new mirror-less laser actions characteristic of a 2D photonic crystal. By optically-pumping a 2D photonic-lattice specimen with the air-holes filled with a dye-solution, we observed the laser action at two specific wavelengths, i.e., one around the peak of the spontaneous emission spectrum and the other at a longer wavelength. The respective mechanisms are elucidated as being caused by a high Q-value of an uncoupled eigen-mode and a slow group velocity at a specific wavelength resulting in a long effective interaction length with the help of a small amount of feedback at the interfaces.Next, on the basis of a simulation experiment in the far-infrared region we have found that a simple cubic lattice made of a high dielectric constant should have a full band gap, which is most attractive for developing such a 3D photonic lattice at visible wavelengths.We have also developed theoretical woks with a lots of outcomes. Namely, we have assigned the respective eigen-modes the group theoretical symmetry in a few typical 2D and 3D photonic lattices, including identification of the uncoupled mode, constructed a general theory on the basis of Green function for optical response of the photonic crystal, and also developed a new method for exploring defect modes.

我们首次成功制造了晶格常数为1μm量级的二维光子晶体，具有常见的H偏振二维光子带隙。我们通过实验揭示了独特的光学特性，其中包括不能耦合到外部平面波的非耦合模式的存在，0阶到3阶布拉格反射强度的反常激发波长相关光谱，这是各个光子带的物理性质，以及放置在二维光子晶格中的少量分子的发射光谱，这些光谱也反映了当前光子态的密度。我们发现了二维光子的新无镜激光作用特征水晶。通过对气孔充满染料溶液的二维光子晶格样本进行光学泵浦，我们观察到了两个特定波长下的激光作用，即一个在自发发射光谱的峰值附近，另一个在较长的波长下。各自的机制被阐明是由非耦合本征模的高 Q 值和特定波长下的慢群速度引起的，从而在界面处的少量反馈的帮助下产生长的有效相互作用长度。基于远红外区域的模拟实验，我们发现由高介电常数制成的简单立方晶格应该具有全带隙，这对于开发这种可见光波长的3D光子晶格最有吸引力。我们还开发了理论工作有很多成果。也就是说，我们在一些典型的2D和3D光子晶格中分配了各自的本征模的群理论对称性，包括非耦合模式的识别，构建了基于格林函数的光子晶体光学响应的一般理论，以及还开发了一种探索缺陷模式的新方法。