Research Projects
Spin-orbit interaction in InSb heterostructure nanodevices
2018-present
I am currently a researcher at the University of Surrey working within the Photonics and Quantum Sciences group at the University of Surrey’s physics department and the Advanced Technology Institute (ATI). My MPhil project is on investigating the initialization of electron spin states for spin injection into quantum technologies through the development of novel direct-write fabrication techniques to create versatile InSb-based spin polarizing devices. This involves a combination of researching quantum transport in InSb quantum wells as well as fabrication and testing of various nanodevices made from said quantum wells, such as quantum point contacts and quantum wires. I’m particularly interested in studying the Rashba interaction and the potential for Majorana Zero Modes in InSb heterostructures.
Video: Watch me explain my thesis in three minutes- ‘Spintronics: a new age of electronics?’
Poster: Fast prototyping of nanoscale InSb devices using focused ion beam lithography
Daisy with the Focused Ion Beam— an apparatus used for nanofabrication.
Electroabsorption Modulated Lasers
2017
During my MPhys degree, I had the opportunity to carry out research for my dissertation— titled ‘Investigating the DC Opto-electrical & Large Signal Characteristics of Electroabsorption Modulated Lasers' — as part of a 9-month internship at the Centre for Integrated Photonics. The company’s research focused on semiconductor-based Photonic Integrated Circuits (PICs) for telecommunications. The project I was assigned to involved the optimization and development of high-speed Electroabsorption Modulated Lasers. These are a type of PIC consisting of a Distributed Feedback Laser followed by an Electroabsorption Modulator. These devices utilise the Quantum-confined Stark effect to modulate laser output and transmit data down optical fibres. My work involved the measurement of both the DC and high-speed characteristics of these devices as well as the modelling and analysis of eye diagrams. I investigated the physical cause of various saturation modes in measured eye diagrams as well as developing a Matlab program to quantify the amount of saturation.
Presentation slides: Investigating Electroabsorption Modulated Lasers at the Centre for Integrated Photonics
An example of an eye diagram.