Expérimental
This scientific project focuses on coupling nano-emitters to optical micro-cavities, with potential applications in quantum telecommunication and advanced photonics. One key application is the Purcell effect, which accelerates the spontaneous decay rate and funnels photons into a single optical mode. The strength of light-matter coupling depends on the ratio of the quality factor to the cavity mode volume. Two approaches exist to optimize this: the plasmonic route, which achieves sub-wavelength mode volumes but suffers from Ohmic losses, and the dielectric resonator route, which attains high Q but is limited by the diffraction limit. This project proposes to combine the strengths of both approaches by designing modified dielectric cavities that achieve high Q with sub-wavelength volumes using near-field techniques. These cavities will couple with solid-state nano-emitters, such as carbon nanotubes or graphene quantum dots, to create artificial atoms for quantum technology applications. By utilizing the discontinuities of the electric field in a dielectric bow-tie antenna, the project aims to create ultra-small mode volumes. Coupling nano-emitters to these cavities requires spatial and spectral matching, achieved through open-cavities with a mirror on the tip of an optical fiber. The bow-tie antenna will be fabricated on this fiber, and the project focuses on designing, nanofabricating, and testing these antennas.