Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2023-03-31 |
| Journal | Scientific Reports |
| Authors | Reza Hekmati, John P. Hadden, Annie Mathew, Samuel G. Bishop, Stephen A. Lynch |
| Institutions | Cardiff University |
| Citations | 10 |
Abstract
Section titled āAbstractāAbstract Coupling light from a point source to a propagating mode is an important problem in nano-photonics and is essential for many applications in quantum optics. Circular ābullseyeā cavities, consisting of concentric rings of alternating refractive index, are a promising technology that can achieve near-unity coupling into a first lens. Here we design a bullseye structure suitable for enhancing the emission from dye molecules, 2D materials and nano-diamonds positioned on the surface of these cavities. A periodic design of cavity, meeting the Bragg scattering condition, achieves a Purcell factor of 22.5 and collection efficiency of 80%. We also tackle the more challenging task of designing a cavity for coupling to a low numerical aperture fibre in the near field. Finally, using an iterative procedure, we study how the collection efficiency varies with apodised (non-periodic) rings.