Design and fabrication of semiconductor spin qubits for quantum computing: electrical characterization

This thesis presents the design of the electrical characterization protocol of Single-Electron Transistors (SETs) for semiconductor spin qubit applications in quantum computing. SETs were manufactured in silicon using CMOS-compatible processes. Dedicated protocols for room-temperature and low-temper...

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Detalles Bibliográficos
Autor: Gaya Salas, Pol
Tipo de recurso: tesis de maestría
Fecha de publicación:2025
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:2117/452210
Acceso en línea:https://hdl.handle.net/2117/452210
Access Level:acceso abierto
Palabra clave:Quantum computing
Transistors
Circuits integrats analògics CMOS
Single-electron transistors
SET
Electrical characterization
Computació quàntica
Àrees temàtiques de la UPC::Física::Física de l'estat sòlid::Semiconductors
Descripción
Sumario:This thesis presents the design of the electrical characterization protocol of Single-Electron Transistors (SETs) for semiconductor spin qubit applications in quantum computing. SETs were manufactured in silicon using CMOS-compatible processes. Dedicated protocols for room-temperature and low-temperature characterization have been developed. The methodology includes validation of electrical contacts, source/drain activation, and channel modulation tests to verify structural integrity and transistor-like behaviour prior to cryogenic operation. Experimental results demonstrate that several devices exhibit stable modulation, validating the manufacturing process and confirming gate and barrier control. A cryogenic measurement setup was also implemented, integrating lock-in amplification and synchronized voltage control for future low-temperature experiments. This work provides a validated protocol, automated data analysis tools, and a robust foundation for further cryogenic characterization and integration of SETs into silicon-based quantum architectures.