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 5 of 5 for “"Acoustic and optical modes"”.
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Full-vectorial study of light and sound interactions in low and high index contrast silica waveguides
… developed to find accurate modal solutions of acoustic modes in Ge-doped and un-doped planar silica waveguides. The structural symmetry is exploited and Aitken’s extrapolation is also used to improve the accuracy of the solutions. The spatial dependences of the dominant and non-dominant …
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Computer simulation of lattice defects in Ni₃Al
… were found to relax in two different oscillation modes namely the acoustic and optical modes. While the former is similar to the relaxation observed in pure Aluminum or Nickel, the latter was found to be a result of micromoments within the unit cell. The presence of atoms that differ in size and …
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The characterisation of acoustic waves in optical waveguides
… The Stimulated Brillouin scattering (SBS) in optical waveguide is an important nonlinear effect results from the coherent interactions between optical and acoustic modes. The SBS can be considered as a primary obstacle effect in limiting the power scaling in many high power photonic devices …
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Characterisation of acoustic waves in optical waveguides
… The Stimulated Brillouin scattering (SBS) in optical waveguide is an important nonlinear effect results from the coherent interactions between optical and acoustic modes. The SBS can be considered as a primary obstacle effect in limiting the power scaling in many high power photonic devices …
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Magnetodynamics of pseudo spin valves investigated using co-planar waveguide and spin torque ferromagnetic resonance techniques
… a wide range of highly nonlinear localized and propagating spin wave modes for use in magnonics. In this thesis, we study some aspects of these structures from the fundamental physics point of view using the spin torque ferromagnetic resonance technique (ST-FMR) and conventional broadband …