Freiburg 2019 – wissenschaftliches Programm
FM 63: Poster: Enabling Technologies: Quantum Materials, Quantum Dots, Quantum Wires, Point Contacts and Superconducting Systems
FM 63.18: Poster
Mittwoch, 25. September 2019, 16:30–18:30, Tents
Characterization of in-house grown CVD diamond with NV centers — •Tingpeng Luo1, Lukas Götz1, Brett Johnson2, David Simpson2, Liam Hall2, Di Wang2, Julia Langer1, Volker Cimalla1, and Jan Jeske1 — 1Fraunhofer IAF, Freiburg, Germany — 2The University of Melbourne, Melbourne, Australia
Nitrogen-vacancy (NV) centers in diamond with its special optical and spin properties have become a promising instrument for quantum sensing. For sensitive sensing with high NV density, we aim to combine chemical vapour deposition (CVD) growth and consecutive characterization to optimize material parameters, which often are contrary in demand: High NV density concentration, yet long coherence time, low absorption or low birefringence. We design a systematic procedure to investigate the quality of in-house grown NV ensemble CVD diamonds, comparing our CVD diamond with type 1b high-pressure-high-temperature (HPHT) diamond. Multiple methods such as EPR, FTIR, photoluminescence maps, ODMR, UV-Vis spectroscopy and birefringence measurements are applied in the characterization work, to investigate the NV center formation in the synthesis procedure, the absorption, and the birefringence. Moreover, we take ODMR and coherence time measurements to investigate the spin properties. These methods give preliminary results of our first grown CVD diamond series, which assist to establish a further growth plan.