All-diamond photonic and phononic platforms

Diamond offers unique capabilities for applications in quantum information processing including long-lived, spin-based memory registers and spin-photon interfaces. The efficiency of the spin-photon interfaces is a most crucial parameter for scalable applications like diamond-based quantum repeaters or quantum networks. We are aiming to develop highly-efficient spin-photon interfaces by employing all-diamond photonic and phononic platforms. By structuring diamond on the micro- and nanoscale we can affect the optical properties, for example, by Purcell-enhanced photon emission of single color center in optical resonators. Furthermore, the coherence properties can be improved by tailoring nanostructuring towards a desired phonon density of states and a desired electron-phonon interaction.

Selected references:

K. G. Fehler, et al., „Efficient Coupling of an Ensemble of Nitrogen Vacancy (NV-) to the Mode of a High-Q, Si3N4 Photonic Crystal Cavity“. ACS Nano 13, 6, 6891-6898 (2019)

B. J. M. Hausmann, et al., Integrated Diamond Networks for Quantum Nanophotonics. Nano Letters 12, 3, 1578-1582 (2012)