Figure 2
From: Bullseye dielectric cavities for photon collection from a surface-mounted quantum-light-emitter
Bullseye cavity design. (a, b) Purcell factor as a function of the central disk diameter (a) and the duty cycle (b), and wavelength. (c, d) Collection efficiency into an ideal lens with an numerical aperture of 0.68 as a function of the central disk diameter (c), and the duty cycle (d) and wavelength. The optimal design for a resonance wavelength of 750 nm is achieved with a central disk size of 1.67 µm and a duty cycle of 0.66. The simulated cavity contains 10 rings-periods. (a) and (c) used duty cycle 0.67. (b) and (d) used \(R_{TiO_{2}} = 1.67 \, \upmu \hbox {m}\).
