Project title: Organic dye molecules coupling to nanocavities for single photon sources
Supervisors: Alex Clark and Ed Hinds
Cryogenically cooled organic dye molecules are excellent sources of indistinguishable photons . They can, however, be drastically improved through the use of optical cavities . Integrated nano-cavities are inherently stable, as they are in the solid state, and have small mode volumes comparable with the wavelength of light. When a quantum emitter, such as a dibenzoterrylene (DBT) molecule, is placed at the correct position within such a cavity the emitter will preferentially emit photons into a single spatial-spectral-polarisation mode and can also do so at a much faster rate than it would have done outside the cavity – known as Purcell enhancement. This project aims to design and fabricate nanophotonic cavities, such as bullseye grating cavities and Gaussian defect cavities, and characterise their coupling to DBT molecules.
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