Welcome to the Quantum Optics & Mesoscopic Systems Group at the Cavendish Laboratory, University of Cambridge!

Research Topics Pursued by Our Group:

Quantum-Dot Spin Systems:

We study the dynamics of few spins in quantum confined systems with an aim of optical control and manipulation of multiple spins. The physical systems include both coupled quantum dots for spin-pair configurations and quasi-2D structures for many-body effects in the presence of weak coupling.

Plasmonic Cavity Quantum Electrodynamics and Metamaterials at Optical Frequencies:

We study solid-state-based cavity QED with light confinement at sub-wavelength scale. Using metal nanostructures and plasmon polaritons, we aim at achieving individual or ensemble strongly coupled emitter-cavity systems. Further, we study how sub-wavelength structures of a medium alter the material-based properties, so the optical fields can experience exotic media with negative refractive indices.

High-Resolution Coherence Spectroscopy of Optically Active Impurities in Diamond:

Color centers in diamond provide a suitable test bed for applications of quantum information processing, as well as selected spin-spin interactions. While there are hundreds of known color centers in diamond, but only one (Nitrogen vacancy) is studied extensively. We study optical properties and identify energy levels of alternative color centers both naturally occurring and artificially implanted, potential candidates being Ni, Si, Co, and Fe impurities.

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