Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 6 of 6 for “"Plane-wave expansion method"”.
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Modeling and characterization of elastic wave propagation in micro-scale photonic crystals
… Filtering, guiding and mirroring of elastic waves are a few applications in which phononic crystals can be used. In this manuscript, the physical origins of phononic bandgaps were successfully determined using a one-dimensional model to isolate resonances contributing to the creation of …
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Acoustic and mechanical properties of viscoelastic, linear elastic and nonlinear elastic composites
… approximation techniques, such as the asymptotic expansion method and the plane-wave expansion method, are used to obtain the macroscopic acoustic properties of the structure and to determine the frequency bands (passing and stopping bands) of the composite. Stress distribution in the viscoelastic …
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Algorithms and technologies for photonic crystal modelling
… crystals was carried out using numerical methods. Photonic crystals are expensive and difficult to fabricate so there is a requirement for computer simulations that can quickly and accurately model how the crystal structure will affect the behaviour of light. A finite difference method was …
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Terahertz oscillation and stimulated emission from planar microcavities
… with structural sizes in the range of the light wavelength, where the photonic modes are con- fined and the number of states is limited. In the smallest microcavities, i.e. micrometer sized optical resonators, the propagation of only one mode is permitted that is simultaneously amplified …
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Predictive simulation and design of III-V heterostructures for light emission and detection
… on density functional theory (DFT) and the k·p method – calculations to analyse and optimise III-V semiconductor heterostructures for light emission and detection. III-V superlattices (SLs) have attracted significant interest for emission and detection at mid-infrared (mid-IR) wavelengths, for …
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Theory and simulation of quantum nanostructures for integrated photonics
… employ the semi-empirical continuum-based k · p method to analyse the electronic and optical properties of QWs and QDs to enhance the capabilities of these devices. First, we present the QUDOS code: a free, open-source software package to underpin predictive analysis and design of QD …