以二氧化矽及高分子混成奈米粒子來控制光子晶體中之能隙
Other Title
Continuously Tuning Photonic Bandgap of Opal Structures by Utilizing Polymer and Silica Hybrid Colloids
Journal
材料科學與工程
Journal Volume
38
Journal Issue
1
Start Page
24
End Page
28
ISSN
0379-6906
Date Issued
2006-03
Author(s)
Abstract
光子晶體(Photonic Crystals)係在二維或三維空間中，讓材料折射率或介電常數產生週期性變化的結構。本實驗利用膠體粒子的自組裝(Self-Assembly)方式來製作三維光子晶體的蛋白石結構，即將膠體粒子處於一限制空間內，膠體粒子將會以最密堆積(Close-Packed)排列的方式聚集排列於此空間內。此外，我們將兩種不同粒徑粒子相混來製作蛋白石結構，藉由理論配合實驗上的量測，來微調其能隙(Band-gap)位置，並且判斷兩種粒子的分佈情形，配合掃瞄式電子顯微鏡的觀察，來驗證我們所提出的假設。
Photonic crystals, which are the artificial multidimensional periodic structures, are attractive for ultra-compact optoelectronic devices. One of the simple methods is using self-assembly nanospheres such as polystyrene or silica beads to form 3D Close-Packed crystalline structures. An important issue for colloidal spheres based photonic bandgap (PBG) devices is how to fabricate the devices with small bandgap-shift for optoelectronic device applications. In general, it is difficult to tune the size of colloidal spheres continuously excepting for controlling the strict synthesis conditions. In this paper, we demonstrate a simple method that can control the bandgap position by utilizing hybrid polymer and silica beads with large size-difference.
Subjects
光子晶體
蛋白石結構
自組裝
能隙
photonic crystals
photonic bandgap
three-dimensional opal structures
Type
journal article