Enhancing light-matter interactions on a chip is of paramount importance to study nano-and quantum optics effects and for the realisation of integrated devices, for instance, for classical and quantum photonics, sensing and energy harvesting applications. Engineered nano-devices enable the efficient confinement of light and, ultimately, the control of the spontaneous emission dynamics of single emitters, which is crucial for cavity quantum electrodynamics experiments and for the development of classical and quantum light sources. Here, we report on the demonstration of enhanced light-matter interaction and Purcell effects on a chip, based on bio-inspired aperiodic devices fabricated in silicon nitride and gallium arsenide. Internal light sources, namely optically-active defect centers in silicon nitride and indium arsenide single quantum dots, are used to image and characterize, by means of micro-photoluminescence spectroscopy, the individual optical modes confined by photonic membranes with Vogel-spiral geometry. By studying the statistics of the measured optical resonances, in partnership with rigorous multiple scattering theory, we observe log-normal distributions and report quality factors with values as high as 2201±443. Building on the strong light confinement achieved in this novel platform, we further investigate the coupling of single semiconductor quantum dots to the confined optical modes. Our results show cavity quantum electrodynamics effects providing strong modifications of the spontaneous emission decay of single optical transitions.In particular, thanks to the significant modification of the density of optical states demonstrated in Vogel-spiral photonic structures, we show control of the decay lifetime of single emitters with a dynamic range reaching 20. Our findings improve the understanding of the fundamental physical properties of light-emitting Vogel-spiral systems, show their application to quantum photonic devices, and form the basis for the further development of classical and quantum active devices that leverage the unique properties of aperiodic Vogel spiral order on a chip.Engineered photonic devices play a key role in the development of on-chip sources of classical and quantum light for a variety of applications including nano-lasers 1 , single-photon sources 2 , sensors 3 , and energy harvesters 4 . For example, photonic crystal cavities have reached light confinement quality factors of the order of several millions 5 and, thanks to the strong enhancement of the light-matter interaction, have allowed to study light-matter hybridisation 6 , opto-mechanical effects 7 and to obtain bright quantum light emission on a chip 8,9 . However, given the nanometerscale accuracy required in the device fabrication, their scalability is limited 10 . A different route, compared to highly-engineered devices, makes use of fabrication imperfections as a resource to achieve efficient confinement of light in a scalable device [11][12][13] . While disorder-induced lightlocalization is relatively easy to a...
