At SDU Nano Optics, many of us do research in quantum nanophotonics. The research involves single photon emitters, that is, quantum emitters that emit one photon at a time. We work with various kinds of quantum emitters, such as color centers in diamonds, quantum dots, organic molecules, and defects in 2D materials. The emission properties of quantum emitters are, in general, not ideal and they suffer from low emission rates, poor directivity, poor polarization states and wide spectra. With nano-structuring around quantum emitters, the emission properties of quantum emitters can be tailored. We utilize various plasmonic, photonic or hybrid structures such as waveguides, nano-cavities, and meta-surfaces to enhance the properties of emitted photons. We work towards obtaining single photon emitters that emit on-demand indistinguishable photons at high rates with specific polarization states, which are highly desirable for quantum technological applications.
SDU Nano Optics also study non-classical phenomena such as quantum entanglement. With nanostructures around quantum emitters, light-matter interactions can be enhanced, which under specific conditions can result in quantum entanglement between different states of emitted photons or quantum emitters. For example, we have demonstrated quantum entanglement between polarization states and orbital angular momentum (OAM) states of single photons.
Contact
Sergey I. Bozhevolnyi, Professor, Head of Centre for Nano Optics, D-IAS Chair