Interactie van Licht met metallische nanodeeltjes en nanofilms
Abstract
This theoretical work studies standard scattering theory and expands it to include soft boundaries and a longitudinal response. In the first chapter standard scattering theory applied to a sphere (a.k.a. Mie-theory) is explained. In the second chapter Mie-theory is studied further and expanded to include pressure and temperature. These expansions are then applied to two new nanoparticle applications: nanoparticles as heaters and nanoparticles as pressure gauges. The third chapter presents differential equations, derived from the Maxwell equations, which take into account a different longitudinal and transverse response, and which include smooth electron density distributions as encountered in e.g. electronic spill-out in metals or pn-junctions. The soft transitions are studied in more detail in the final chapter by applying the 3D differential equations from chapter 3 in a layered system of films. A powerful numerical algorithm for stratified nanosystems including several density transitions is developed and applied to the experimental setup used for finding the transition of hydrogen to its metallic phase. The general conclusion is that the profile can have a major effect on the optical response of any system, in some cases leading to a complete suppression of both transition and reflection allowing all the light to be completely absorbed.
- Publication:
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Ph.D. Thesis
- Pub Date:
- 2016
- Bibcode:
- 2016PhDT.........5V
- Keywords:
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- Electromagnetics;Optics;Nanoscience