Regensburg 2022 – wissenschaftliches Programm

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QI: Fachverband Quanteninformation

QI 4: Poster: Quantum Information

QI 4.32: Poster

Montag, 5. September 2022, 18:00–20:00, P2

Towards downscaling of inter-electode spacing in PDMR for quantum sensing applications — •Jan Heiden, Marcel Schrodin, and Wolfgang Wernsdorfer — KIT, Karlsruhe, Germany

Photoelectric Detection of Magnetic Resonances (PDMR) states a novel technique for the detection of electronic spin-states in nitrogen vacancy centers (NV centers). Contrary to the currently established optical detection (ODMR), which measures the spin-dependent fluorescence of the negatively charged NV- center, the new method relies on the selectivity of the photocurrent induced by the ionizing conversion between NV0 and NV-. Therefore, gold electrodes are deposited directly onto the diamond surface with current inter-electrode distances of down to 2 um.

Besides improved selectivity, PDMR promises enhanced spatial resolution, purely dependent on the process of micro-fabrication. Further advantages arise from the separation of excitation and signal processing paths towards integration of optical systems into on-chip electronic environments.

The work presented focuses on proceeding the down-scaling of the inter-electrode spacing towards the nanometer regime for diamond-spin based quantum information applications at milikelvin temperatures.