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Excitations Of Quasi-Particles In Nanostructured Systems, Jingxuan Ge

Doctoral Dissertations

The excitation of quasiparticles, like the investigated excitons and plasmons here, are the optically most prominent responses of materials. In nanostructured system, the sample quality is crucial for quantitative investigations of these optical excitations. We used electron beam evaporation, nano-second laser dewetting, and electron metalorganic chemical vapor deposition techniques to prepare well-defined and “clean” transmission electron microscopy (TEM) samples. Electron energy-loss microscopy (EELS) performed in STEM mode was employed to investigate the structural and electro-optical properties. Quantifit software was used to analyze the EELS spectra quantitatively in terms of inelastic scattering probability, energy and lifetime.

We found that the ferroplasmon …