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Title: Numerical analysis of quantum dots nanostructures
Keywords: quantum dot; self assembly; finite element method; elastic anisotropy; morphology; moving least squares
Issue Date: 10-Jun-2004
Citation: QUEK SIU SIN, JERRY (2004-06-10). Numerical analysis of quantum dots nanostructures. ScholarBank@NUS Repository.
Abstract: Quantum dot nanostructures exhibit interesting optical and electronic properties that make them desirable for use in novel electro-optic devices. Fabricating these nanometer scaled structures proved to be a challenging task and one particularly successful method is by self-assembly. A finite element method is used to model the elastostatic fields in a quantum dot structure buried under a cap layer. The effects of elastic anisotropy and crystal orientation is considered and it is found that elastic anisotropy plays a crucial role in determining the vertical and spatial correlation in multiple layers of quantum dot heterostructures. The morphology of the flat wetting layer into a quantum dot island is also numerically simulated by using a mesh-free, moving least squares (MLS) interpolation technique together with the finite difference approach. The surface evolution obtained provided a greater insight to the shape, size, height, time required and spatial configuration of the quantum dot island.
Appears in Collections:Ph.D Theses (Open)

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