以奈米金屬結構及氧化物修飾自組裝二氧化矽蛋白石光子晶體介面於其光學性質之影響

Optical Effect of Decorating the Surface of Self-assembled SiO2 Opal Photonic Crystal with Metal and Dielectric Nanostructure

黃淳寬(CHUN-KUAN HUANG)

指導教授 ： 甘宏志

國立中正大學/理學院/物理學系/碩士(2016年)

摘要

本論文討論兩部分的實驗結果，一為探討在高入射角(約48~60度)的條件下，奈米金屬銀帽對二氧化矽光子晶體造成之影響;我們發現在鍍有銀帽的情形下，會使反射光譜量測中光晶的高階繞射能隙波段呈現的反射峰遭到抑制而轉變為反射谷，這個現象亦證實結合了入射光在週期性晶體結構中三維布拉格繞射及在二氧化矽和空氣接觸面中產生的二維布拉格繞射理論。
第二部分，我們將鍍於二氧化矽光子晶體表面的材料更換成氧化物，且藉由逐步增加氧化物厚度改變光晶性質，觀測且分析其對於光子晶體之光學特徵所造成的影響。
關鍵字:光晶

關鍵字

光晶

並列摘要

This thesis is consists of two parts of our experimental results. First, we use Ag nanocaps as a probe to investigate the physical mechanisms responsible for the higher order Bragg diffraction peaks in the specular reflection spectra of SiO2 nanosphere opal photonic crystals. We decorated Ag nanocaps on the top layer of the SiO2 opal and found that the reflection peaks resulted from higher order Bragg diffraction was changed into dips. This supports a proposed model in the literature that the higher order Bragg peaks is resulted from the combination of 3D Bragg diffraction in the bulk of opal and a 2D Bragg diffraction at the opal surface.
Second, we replace Ag with dielectric nanostructure and wish to see the optical effect it made by increasing its width on the surface of the photonic crystals.
Key Word:Photonic Crystal

並列關鍵字

Photonic Crystal

參考文獻

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