SAW driven source of polarised single photons

Antonio Rubino

Host: University of Cambridge

Scientific Background

I obtained my Bachelor degree in Physics from the University of Salerno in 2013 working on Superconducting Nanowire Single-Photon detectors (SNSPDs) based on high temperature superconductors.
In July 2015, I completed a master degree in Physics at the same University, with a thesis on quantum optics at single-photon level. For the latter, I performed most of the experimental activity at Single Quantum BV and at Delft University of Technology, with Erasmus funding. I studied the single-photon emission and two photon interference from a nanowire quantum dot, the improvement of SNSPDs based on NbTiN and cold filters for the blackbody radiation.


Current Research Topic

I am trying to developed devices in which both electrons and holes are induced in an undoped GaAs/AlGaAs well by gates to form a lateral n-i-p junction. SAWs, generated by a transducer, travel in the n-region and collect electrons which are transported in the p-region where they recombine with the holes. If the stream is composed of single electrons, the recombination with holes should produce a stream of single photons. Furthermore, the recombination of spin-polarised electrons can generate circularly polarised photons, providing a method of spin readout in a quantum computer and a way for conversion of spin qubits into photon qubits.


Goals

I would like to realize a polarised single photon source. This device is one of the building block for the implementation of quantum information and quantum computing.