About the project
Perovskite quantum dots show great potential for tunable light emitters. In particular, they can be employed as single-photon emitters, which are key building blocks for quantum communication networks. This project will study the fundamental photophysics behind photon emission of perovskite semiconductor nanoparticles and develop new platforms for quantum technologies.
Perovskite nanocrystals can be easily fabricated in colloidal suspensions and offer a wide range of colour tunability with high radiative efficiency, making them excellent candidates for light emission applications. Nanoparticles of size comparable with the exciton Bohr radius present quantum confinement and provide another degree of tunability. In addition to classical light emitters, these nanocrystals act as quantum dots and present promising potential for single-photon emitters, which are key building blocks for quantum communications. Perovskite quantum dots offer high radiative efficiency, defect tolerance, high purity at room temperature, and low-cost fabrication.
Furthermore, mixed crystal compositions allow us to tune the emission wavelengths to match specific transitions of quantum memories and other components. Further development is required to improve stability, minimise blinking, and understand and optimise the factors that regulate single photon purity and indistinguishability. The chemical composition, shape anisotropy, and the choice of capping ligands must be optimised to improve efficiency, stability, radiative rates, and quantum coherence.
This project aims to study the photophysics of perovskite nanoparticles and optimise their application as quantum dots for quantum light emission. The project will involve some material processing and fabrication, construction and alignment of optical setups, study of semiconductor photophysics by laser spectroscopy, and fabrication of photonic structures for the integration of quantum dots into functional devices.
