Fabrication and characterization of graphene nanostructures
[ANGLÈS] We fabricate graphene nanostructures for experimental studies on graphene plasmonics and graphene-quantum dot interactions. We use a focused ion beam to mill structures in a substrate, and deposit graphene on top. For plasmonics, we produce free-standing graphene membranes with widths up to...
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| Tipo de recurso: | tesis de maestría |
| Fecha de publicación: | 2012 |
| 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:2099.1/16127 |
| Acceso en línea: | https://hdl.handle.net/2099.1/16127 |
| Access Level: | acceso abierto |
| Palabra clave: | Nanostructures Quantum dots optics optoelectronics nanoestructuras òptica electrònica Nanoestructures Punts quàntics Àrees temàtiques de la UPC::Enginyeria de la telecomunicació::Telecomunicació òptica::Fotònica Àrees temàtiques de la UPC::Enginyeria electrònica::Optoelectrònica |
| Sumario: | [ANGLÈS] We fabricate graphene nanostructures for experimental studies on graphene plasmonics and graphene-quantum dot interactions. We use a focused ion beam to mill structures in a substrate, and deposit graphene on top. For plasmonics, we produce free-standing graphene membranes with widths up to 2 µm on a gold substrate. For strong interactions with quantum dots, we produce a hybrid system consisting of 750 nm and 1 µm wide circles and trenches in a SiO2 substrate, quantum dots, and free-standing graphene membranes. Using chemical doping, we induce changes in the Fermi level of graphene up to around 200 meV, we observe a spontaneous decay of the doping on a time scale of two days. We find that our graphene technique yields mobilities of 3200 cm2/Vs. |
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