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Passive and active waveguide systems for solar concentrators / von M.Sc. Maik Meudt. Wuppertal, 2023
Inhalt
Introduction
Why Solar Concentrators?
Existing Solar Concentrators and Tracking Technologies
Scope of the thesis
Electromagnetic Theory of Waveguides and Structured Systems
Maxwell equations
Plane-Wave-Spectrum, General Coupling Coefficients and Reciprocity
Boundary Conditions
Planar optical waveguides
Fundamentals of Plasmonics
Bulk Plasmons (3D)
Surface Plasmons (2D)
Plasmons in 1D geometries
Localized Surface Plasmons (0D)
Periodic layers for light coupling
Computation of RCWA
Truncation of Fourier orders and an exemplary rectangular grating
Slicing
Conservation of Energy
Phenomena of an Exemplary Waveguide Grating
Bound States in the Continuum (BIC)
Out- and Incoupling Efficiency and Concentration
Short Summary
Experimental Methods
Fabrication methods
Fabrication and Lamination of Dielectric layers
Structuring Methods
Characterization
RTS and ATR
Microscopic Inspection of Edge Emission of Waveguide Modes Excited from High Index Liquid) (MEWEL)
Passive Systems
Plasmonic Structures for Strong and Broadband Light Coupling
Plasmonic Black Silver by Transfer Printing
Fourier-Space engineering via Plasmon- and Light-induced growth of AgNPs
Long Propagation Lengths utilizing TE Node Modes
Complete Suppression of Outcoupling with Hybrid Bound States in the Continuum
Short summary
Active waveguide systems: Broadband Electrically Controlled Light Trapping
Theory of Light Trapping and Perfect Local Outcoupling
Exemplary Calculation of a Symmetric Waveguide
Effects of Finite Beam Size
Effects of Unequal Beam Powers and Varying Relative Phases
Comparison to the Experiment
Outlook
Bibliography