Design and fundamentals of optical nanoantennas for high intensity enhancement or high directivity / von M.Sc. Andre Hildebrandt ; [Promotionskommission: Vorsitzender: Prof. Dr. Cedrik Meier, Erstgutachter: Prof. Dr. Jens Förstner, Zweitgutachter: Prof. Dr. Torsten Meier]. Paderborn, 2017
Inhalt
- Introduction
- Simulation of electromagnetic waves
- Maxwell's equations and propagation of electromagnetic waves
- The Finite-Integration-Technique (FIT)
- Discretization of the computational domain
- Discretization of Maxwell's equations
- Discretization of material relations
- Boundary conditions
- Time integration of Maxwell's equations
- Numerical stability
- Near-Field to Far-Field transformation
- The dielectric function of metals (Drude model)
- Coupled Dipole Approximation (CDA)
- Optimization theory
- General description of optimization problems
- COBYLA
- Controlled Random Search with Local Mutation
- Particle Swarm Algorithm
- Rough Benchmark studies for selected algorithms
- Optical and NIR antennas for light intensity enhancement
- Localized surface plasmon polaritons
- Intensity enhancement of a one-particle nanoantenna
- Intensity enhancement of a two-particle nanoantenna
- Single nano rod and Bow-Tie antennas
- Nano antenna arrays
- Influence of the substrate and surrounding particles
- Optimization of the intensity enhancement of an arbitrary nanoantenna
- Optimization of the intensity enhancement of a bow-tie
- Optimization of the intensity enhancement of a nanoantenna with arbitrary geometrical shape
- Optimization of the intensity enhancement of a nanoantenna consisting of bricks
- Fabrication related constraints
- Optical and NIR antennas with high directivity
- Classical antenna theory
- Optical Yagi-Uda antennas
- Optical Yagi-Uda antenna in vacuum
- Plasmonic Yagi-Uda antennas on substrate
- Optical Yagi-Uda antennas using dielectrics
- Highly directive, all-dielectric optical antennas
- A large, but high performance, all-dielectric antenna
- Experimental verification of the HfO2 antenna
- A one-material, all-dielectric directional antenna
- One-particle, super small, all-dielectric optical antenna
- Conclusion and Outlook
- Parameters
- CDA equations for 5 elements
- Notations and symbols
- Bibliography