# Rostock 2019 – wissenschaftliches Programm

## Bereiche | Tage | Auswahl | Suche | Aktualisierungen | Downloads | Hilfe

# Q: Fachverband Quantenoptik und Photonik

## Q 24: Poster: Quantum Optics and Photonics I

### Q 24.4: Poster

### Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik

**Simulation of NV centers coupled to ****Si**_{3}**N**_{4}** photonic crystal nanobeam cavities** — •Jan Olthaus^{1}, Philip Schrinner^{2}, Carsten Schuck^{2}, and Doris E. Reiter^{1} — ^{1}Institut für Festkörpertheorie, Universität Münster, 48149 Münster, Germany — ^{2}Physikalisches Institut, Universität Münster, 48149 Münster, Germany

The efficient integration of single-quantum emitters with photonic circuits is a major challenge for the development of quantum technologies. A scalable implementation of single-photon emitters (SPEs) on a chip requires a low-loss interface and strong light-matter interaction.

To provide such a platform we create a photonic crystal nanobeam cavity (PhC), which supports a localised mode at the wavelength of the single-photon emitter. If placed inside a resonant cavity, the spontaneous emission rate of SPEs in the weak coupling regime can be enhanced significantly (Purcell effect).
The critical parameters for this enhancement are the Q-factor, mode volume and relative electric field strength at the SPEs position.
A wavelength-scale mode volume can be easily achieved by an appropriate design and there are many approaches to minimise scattering losses of the defect mode.

We present results based on 3D-FDTD simulations of a PhC embedded with a Si_{3}N_{4} waveguide on SiO_{2} substrate coupled to a NV-center in nanodiamond. Besides geometry optimisations, we analyse effects of a substrate and the positioning of an emitter with finite volume.

Our results pave the way for an efficient integration of single-photon sources into photonic circuits.