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

• 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

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.

我们首次成功地制备了晶格常数为1 μ m的二维光子晶体，具有H偏振的共同二维光子带隙。我们在实验上揭示了其独特的光学性质，包括存在不能与外部平面波耦合的非耦合模，0 ~ 3阶布拉格反射强度的反常的依赖于激发波长的光谱，这是相应光子带物理性质的另一种表现，和少量分子在二维光子晶格中的发射光谱，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晶体的新的无镜激光行为特征。通过光泵浦一个空气孔充满染料溶液的二维光子晶格样品，我们观察到了两个特定波长的激光作用，即，一个在自发发射光谱的峰值附近，另一个在较长的波长处。相应的机制被阐明为由非耦合本征模的高Q值和特定波长处的慢群速度引起，从而在界面处的少量反馈的帮助下导致长的有效相互作用长度。在远距离模拟实验的基础上，红外区域我们发现由高介电常数制成简单立方晶格应该具有全带隙，这对发展可见光波段的三维光子晶格是最有吸引力的。我们也开展了大量的理论工作，取得了许多成果。即在几种典型的二维和三维光子晶格中，赋予了本征模群理论对称性，包括非耦合模的识别，建立了基于绿色函数的光子晶体光学响应的一般理论，并发展了一种探索缺陷模的新方法。

项目成果

M.Wada etal.: "A simple cubic photonic lattice in silicon" Applied physics Letters. 70. 2996-2998 (1997)

M.Wada 等人：“硅中的简单立方光子晶格”应用物理快报。

K.Sakoda etal.: "Numerical method for Localized defect modes in photonic lattices" Physical Review B. 56. 4830-4835 (1997)

K.Sakoda 等人：“光子晶格中局部缺陷模式的数值方法”物理评论 B. 56. 4830-4835 (1997)

K.Sakoda: "Numerical analysis of the interference patterns in the optical transmission spectra of a square photonic lattice" J.of Optical Society of America, B. 14-8. 1961-1966 (1997)

K.Sakoda：“方形光子晶格光学传输光谱中干涉图案的数值分析”，美国光学学会杂志，B. 14-8。

K.Sakoda: "Group-theoretical classification of eigenmodes in three-dimensional photonic lattices" Physical Review B. 55・23. 15345-15348 (1997)

K.Sakoda：“三维光子晶格中本征模的群理论分类”物理评论 B. 55・23（1997）

K.Sakoda etal.: "Numerical analysis of eigenmodes localized at line defects in photonic lattices" Physical Review B. 56. 14905-14908 (1997)

K.Sakoda 等人：“光子晶格中线缺陷局域本征模的数值分析”物理评论 B. 56. 14905-14908 (1997)