Executive Summary : | Ultra-bright solid-state single photon sources (SPS) play a crucial role in the development of quantum optical technologies. These SPSs can be based on various materials, such as diamond, defects in silicon carbide, quantum dots, and hexagonal Boron Nitride. However, efficient coupling is limited due to the large index mismatch between the host medium and its surrounding. To enhance coupling, several approaches have been developed. One approach involves coupling the SPS with photonic crystals-based cavities, which enhances local density of states (LDOS) at specific frequencies, leading to spontaneous emission rate (SER) and Purcell factor enhancement. However, Fp enhancement is limited to a small mode volume. Another approach involves coupling the SPS with plasmonic structures, which leads to field confinement and LDOS and Fp enhancement. A recent approach involves coupling the SPS with layered metamaterials like hyperbolic metamaterials (HMMs). This results in enhanced and broadband emission due to the subwavelength confinement of the emitter and the availability of high momentum, large Bloch modes. However, the anisotropic permittivity behavior of HMMs results in a large momentum mismatch between these modes and free space, limiting effective outcoupling into the far field domain. To overcome this problem, an effective antenna scheme is required, including various types of plasmonic nano-antennas. The knowledge gained from studying planer HMM resonators computationally in-depth with various plasmonic antennas can help design a practical SPS with a photon counts rate in GHz with a CE of 2/3 or above. |