Defect modes in metallo-dielectric photonic crystals

金属介电光子晶体中的缺陷模式

• 批准号: 5318804
• 负责人: Professor Dr. Gero von Plessen
• 金额: --
• 依托单位: Lehrstuhl für Photonik und Optoelektronik
• 依托单位国家: 德国
• 项目类别: Priority Programmes
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2003-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5318804?language=en
• 关键词: Defect; modes; metallo; dielectric; photonic

We propose to study and control photonic defect modes in plenar metallo-dielectric photonic crystals. The photonic crystal structures consist of arrays of gold and silver nanoparticles deposited on dielectric surfaces using electron beam lithography. Defects will be intentionally introduced into the arrays, and the resulting photonic defect modes will be experimentally studied using advanced optical techniques with wavelength and sub-wavelength spatial resolutions. Light-scattering from individual defects will be measured and used to characterize the spectral properties and the symmetries of the defect modes. The spatial mode distribution and optical field enhancement associated with the localized defect-mode will be measured using near-field scanning optical microscopy (NSOM) techniques. The structural parameters of the photonic crystals will be varied systematically in order to understand, and make controllable, the properties of the defect modes, including spatial position in the crystal, spatial size, spectral distribution, and field enhancement associated with the mode localization. In particular, we will attempt to maximize the field enhancement by combining it with the local-field enhancement at the metal surface related to resonant excitation of surface plasmons. Our ultimate objective is to use this approach to create photonic crystal structures with extremely high, localized, optical fields which may be used, e.g., in nonlinear optical applications and for single-molecule spectroscopy.

我们提出研究和控制平面金属介质光子晶体中的光子缺陷模。光子晶体结构由使用电子束光刻法沉积在电介质表面上的金和银纳米颗粒阵列组成。缺陷将被故意引入到阵列中，并且将使用具有波长和亚波长空间分辨率的先进光学技术对所产生的光子缺陷模式进行实验研究。将测量单个缺陷的光散射，并用于表征光谱特性和缺陷模式的对称性。利用近场扫描光学显微镜（NSOM）技术测量了与局部缺陷模相关的空间模分布和光场增强。光子晶体的结构参数将被系统地改变，以便理解和控制缺陷模式的性质，包括在晶体中的空间位置、空间尺寸、光谱分布和与模式局部化相关的场增强。特别是，我们将试图通过将其与表面等离子体激元的共振激发相关的金属表面处的局部场增强相结合来最大化场增强。我们的最终目标是使用这种方法来创建具有极高的局部光场的光子晶体结构，用于非线性光学应用和单分子光谱学。