How to analyze optical scattering properties of an object or an ensemble of objects? It is often a nontrivial task to answer this question. There exists analytical formulas to calculate the scattering response of a simple object for a given illumination, and several numerical methods for more complicated structure can be used for the same purpose. However, probing the response of an object for one particular illumination scenario does not give the full picture as, in principle, there can be an infinite number of possible illumination scenarios. It is therefore a tedious task to consider all possible illumination scenarios to analyze the scattering properties of an object. To complicate the problem further, for an ensemble of randomly located and randomly oriented particles, it is almost impossible to predict exactly the response of the entire ensemble, and statistical means to extract observables quantities are needed.

To solve these problems, we rely in this thesis on a modal analysis of the T-matrix of the scatterer to analyze the optical scattering properties of a single object independent from a specific llumination. We also develop means to predict experimentally observables quantities of an ensemble of randomly oriented particles and analyze them in the context of modes sustained by its constituent scatterer. ... mehr

To solve these problems, we rely in this thesis on a modal analysis of the T-matrix of the scatterer to analyze the optical scattering properties of a single object independent from a specific llumination. We also develop means to predict experimentally observables quantities of an ensemble of randomly oriented particles and analyze them in the context of modes sustained by its constituent scatterer. ... mehr

Zugehörige Institution(en) am KIT |
Institut für Theoretische Festkörperphysik (TFP) Karlsruhe School of Optics & Photonics (KSOP) |

Publikationstyp |
Hochschulschrift |

Publikationsdatum |
04.06.2020 |

Sprache |
Englisch |

Identifikator |
KITopen-ID: 1000119939 |

Verlag |
Karlsruhe |

Umfang |
X, 108 S. |

Art der Arbeit |
Dissertation |

Fakultät |
Fakultät für Physik (PHYSIK) |

Institut |
Institut für Theoretische Festkörperphysik (TFP) |

Prüfungsdatum |
26.07.2019 |

Referent/Betreuer |
Prof. C. Rockstuhl |

Projektinformation |
DFG, DFG EIN, RO 3640/4-1 |

KIT – Die Forschungsuniversität in der Helmholtz-Gemeinschaft

KITopen Landing Page