Single Photon Source for Quantum Computing and Simulation

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The student will work on semiconductor quantum light sources. Light is an ideal carrier of quantum information as photons are fast, cheap and easy to encode with quantum-bits carried in their polarisation, phase, time or path degrees of freedom. This project will work with a light source based on a single Indium-Gallium-Arsenide semiconductor quantum dot, as these can offer > 99% spectrally pure photons at high efficiency.The project is funded by the UK National Hub in Quantum Computing and Simulation (Hub-QCS). The source will be produced in Cardiff's Institute for Compound Semiconductors cleanroom and tested in our new optical labs. The focus of year 1 will be increasing the efficiency and purity of the source through design and experiment. In Year 2 the student will collaborate with partners in the Hub-QCS to demonstrate re-routing of photons in prototype network. In Year 3 the student will build on previous research to demonstrate non-linear optical effects in the device.