dc.contributor.advisor | Kildemo, Morten | |
dc.contributor.author | Bogen-Storø, Torbjørn | |
dc.date.accessioned | 2024-06-20T17:21:31Z | |
dc.date.available | 2024-06-20T17:21:31Z | |
dc.date.issued | 2024 | |
dc.identifier | no.ntnu:inspera:164924298:37315878 | |
dc.identifier.uri | https://hdl.handle.net/11250/3135155 | |
dc.description.abstract | Denne avhandlingen undersøker design, fabrikasjon og Finite-Difference Time-Domain (FDTD)
simuleringer av optiske metasurfacer, med vekt p ̊a polarisasjon -splittende metasurfacer. Avhand-
lingen fokuserer hovedsakelig p ̊a to typer metasurfaces: Gap Surface Plasmon (GSP) metasurfacer
rettet mot ̊a oppn ̊a en større brytningsvinkel, og amorfe silisium (a-Si) søylebaserte metasurfaces
med en integrert blender ̊apning.
Fabrikasjonsprosessen for GSP metasurfaces ble gjennomført, til tross for noen manglende meta-
atomer, sannsynligvis p ̊a grunn av et feil forhold mellom resist og metallisk lagtykkelse i lift-
off prosessen. Design og innledende stadier av a-Si søyle metasurfaces ble fullført, selv om full
fabrikasjon ikke ble oppn ̊add p ̊a grunn av tid og utstyrsbegrensninger. Integreringen av en aperture
i metasurface-designet ble igangsatt og karakterisert, noe som indikerer nødvendigheten av videre
undersøkelse.
I tillegg til produksjon, ble en metode for ̊a trekke ut Mueller Matrices i FDTD-simuleringer
utvikley, noe som gir et lovende grunnlag for videre bruk. Denne tilnærmingen er spesielt gunstig
for store, ikke-periodiske metasurfaces, der FDTD tilbyr fordeler over Finite Element Method
(FEM). | |
dc.description.abstract | This thesis investigates the design, fabrication, and Finite-Difference Time-Domain (FDTD) simu-
lations of optical metasurfaces, with an emphasis on polarization beam splitting metasurfaces. The
study primarily focuses on two types of metasurfaces: Gap Surface Plasmon (GSP) metasurfaces
aimed at achieving a greater angle of refraction than previous work, and amorphous silicon (a-Si)
pillar-based metasurfaces with an integrated aperture for camera integration.
The fabrication process of GSP metasurfaces was executed, despite some missing meta-atoms
likely due to an incorrect ratio between resist and metallic layer thickness in the lift-off process.
The design and preliminary stages of the a-Si pillar metasurfaces were completed, although full
fabrication was not achieved due to time and equipment constraints. The integration of an aperture
into the metasurface design was initiated and characterized with intensity measurements, indicating
the necessity for further fine-tuning of process characteristics.
In addition to manufacturing, a methodology for extracting Mueller Matrices in FDTD simulations
was developed and successfully implemented, providing a promising basis for further refinement.
This approach is particularly beneficial for large, non-periodic metasurfaces, where FDTD offers
advantages over Finite Element Method (FEM). | |
dc.language | eng | |
dc.publisher | NTNU | |
dc.title | Design and Manufacturing of Polarization Beam-Splitting Metasurfaces, and FDTD Simulations of their Mueller Matrices | |
dc.type | Master thesis | |