Please use this identifier to cite or link to this item: http://scholarbank.nus.edu.sg/handle/10635/14964
Title: Fabrication and characterization of photonic crystals
Authors: WANG YANHUA
Keywords: colloidal crystals, photonic crystals, photonic bandgap, surfactant, sedimentation, vertical deposition
Issue Date: 25-Oct-2005
Source: WANG YANHUA (2005-10-25). Fabrication and characterization of photonic crystals. ScholarBank@NUS Repository.
Abstract: In our studies, high-quality colloidal crystals with the typical size of a single crystalline domain larger than 200 micrometer were fabricated from colloidal particles by sedimentation and vertical deposition. Their reflectance spectra measured with UV-Vis spectrometer show that they possess photonic stop bandgaps. Consequently, we investigated the effect of surfactants on the array fashion of the colloidal crystals and found that the square array was favorable to form in the presence of surfactants. Also, we explored a new procedure for fine tuning the photonic bandgap properties of three-dimensional silica colloidal crystals by pre-heating treatment. Furthermore, we fabricated crystals of air spheres in titania using colloidal crystal templating method. Their stop bandgaps were proved with micro-FTIR transmission spectra. Additionally, SDS was added into the infiltration material (TPT) and achieved tight coating of TiO2 on the polystyrene microspheres.
URI: http://scholarbank.nus.edu.sg/handle/10635/14964
Appears in Collections:Master's Theses (Open)

Show full item record
Files in This Item:
File Description SizeFormatAccess SettingsVersion 
Thesis.pdf3.21 MBAdobe PDF

OPEN

NoneView/Download

Page view(s)

327
checked on Dec 11, 2017

Download(s)

244
checked on Dec 11, 2017

Google ScholarTM

Check


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.