Comparison of the optical properties of metallic and high dielectric 2D metasurfaces
Chiral metasurfaces can transmit one circularly polarized light, while almost completely refuse the opposite handedness. In this project, a comparison of the optical properties of metallic vs high dielectric 2D chiral metasurfaces is made. Firstly, we discuss the general method to fabricate a chiral...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2022 |
| País: | España |
| Institución: | Universitat Politècnica de Catalunya (UPC) |
| Repositorio: | UPCommons. Portal del coneixement obert de la UPC |
| Idioma: | inglés |
| OAI Identifier: | oai:upcommons.upc.edu:2117/377309 |
| Acceso en línea: | https://hdl.handle.net/2117/377309 |
| Access Level: | acceso abierto |
| Palabra clave: | metasurfaces Nanostructured materials chiral metamaterial absorbers high dielectric 2D metasurfaces metallic 2D metasurfaces circular dichroism soft lithography nanoimprinting Materials nanoestructurats Àrees temàtiques de la UPC::Física::Física de l'estat sòlid |
| Sumario: | Chiral metasurfaces can transmit one circularly polarized light, while almost completely refuse the opposite handedness. In this project, a comparison of the optical properties of metallic vs high dielectric 2D chiral metasurfaces is made. Firstly, we discuss the general method to fabricate a chiral metasurface using the scalable technique of nanoimprinting soft lithography. Subsequently, numerical finite-difference time-domain (FDTD) simulations have been performed and compared with the experimentally measured chiroptical response of the nanoimprinted samples. These calculations show that each kind of metasurface presents a particular circular dichroism (CD), as plasmonic metasurfaces present better CD in transmittance due to their higher absorption, whereas the high dielectric materials can potentially generate chiral photoluminescence. |
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