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Simulations on single-mode waveguides in GaAs

Zwol, F. A. van (2015) Simulations on single-mode waveguides in GaAs. Bachelor's Thesis, Physics.

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Waveguides improve the interaction between light and matter in quantum experiments. We examine the possibility to integrate a single-mode waveguide into the GaAs/AlGaAs sample, for experiments in a cryogenic confocal microscope setup. Making this sample single-mode is challenging because the number of modes increases with core thickness. We solve this problem by bringing the refractive index of the core very close to the refractive index of the cladding of 2D waveguides that confine light in one direction. We looked at the difference between symmetric and asymmetric waveguides. The most asymmetric situation with the refractive index of one cladding close to the core and the refractive index of the other cladding much lower than the core yields the highest possible core thickness. We also looked at 3D waveguide structures that confine light in two directions. We used the Marcatilli method to solve for the rectangular 3D waveguide and found that the same theory as for slab waveguides applies. We also tried to solve more complex structures.

Item Type: Thesis (Bachelor's Thesis)
Degree programme: Physics
Thesis type: Bachelor's Thesis
Language: English
Date Deposited: 15 Feb 2018 08:05
Last Modified: 15 Feb 2018 08:05

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