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Title: Fabrication of 3D photonic crystals with self-assembled colloidal spheres as the template
Keywords: Photonic Crystal, Colloidal Crystal, Self-assembly, Crack-free, Non-close Packed, Planar Defect
Issue Date: 7-Jan-2009
Citation: WANG LIKUI (2009-01-07). Fabrication of 3D photonic crystals with self-assembled colloidal spheres as the template. ScholarBank@NUS Repository.
Abstract: Photonic crystals, a type of materials with periodically varying refractive index, open an opportunity of controlling the behavior of photons by the photonic bandgap. Due to the high cost and difficulty of fabricating three-dimensional photonic crystals using traditional lithography method, the self-assembly method that utilizes colloidal microspheres as the primary building units has been considered as a promising approach. This thesis work focuses on the fabrication of photonic crystals using self-assembly method. First, an approach to the fabrication of crack-free colloidal crystals was designed and demonstrated for the first time. Second, the fabrication of non-close packed opal was achieved through the combination of chemical vapor deposition and templating methods. Third, binary colloidal crystals were synthesized using a horizontal deposition method. Fourth, a general route of introducing planar defects into colloidal photonic crystals was illustrated by using the horizontal deposition and spin-coating together. Finally, a colloidal crystal templating method was proposed for patterning the surface of microspheres and uniform nonspherical particles were obtained using the surface-patterned spheres as seeds.
Appears in Collections:Ph.D Theses (Open)

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