Abstract

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 “bullseye” 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.

Details

Title
Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter
Author
Hekmati, Reza 1 ; Hadden, John P. 2 ; Mathew, Annie 1 ; Bishop, Samuel G. 2 ; Lynch, Stephen A. 1 ; Bennett, Anthony J. 3 

 Cardiff University, School of Physics and Astronomy, Cardiff, UK (GRID:grid.5600.3) (ISNI:0000 0001 0807 5670) 
 Cardiff University, School of Engineering, Cardiff, UK (GRID:grid.5600.3) (ISNI:0000 0001 0807 5670) 
 Cardiff University, School of Physics and Astronomy, Cardiff, UK (GRID:grid.5600.3) (ISNI:0000 0001 0807 5670); Cardiff University, School of Engineering, Cardiff, UK (GRID:grid.5600.3) (ISNI:0000 0001 0807 5670) 
Pages
5316
Publication year
2023
Publication date
2023
Publisher
Nature Publishing Group
e-ISSN
20452322
Source type
Scholarly Journal
Language of publication
English
ProQuest document ID
2793283393
Copyright
© The Author(s) 2023. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.