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HL: Fachverband Halbleiterphysik

HL 50: Materials and devices for quantum technology III

HL 50.1: Vortrag

Freitag, 31. März 2023, 09:30–09:45, JAN 0027

3D magnetic resonance tomography of nitrogen vacancy centers with sub-10nm resolution — •Mohammad T Amawi^{1, 2}, Andrii Trelin¹, You Huang¹, Georg Braunbeck², Francesco Poggiali¹, and Friedemann Reinhard¹ — ¹Institute for Physics, Quantum Technology, University of Rostock, Germany — ²Physics Department, Technical University of Munich, Germany

We present a device for three-dimensional magnetic resonance tomography with nanoscale resolution, and apply it to image the spatial position of a nitrogen-vacancy center (NV) cluster in bulk diamond. Three orthogonal magnetic field gradients, generated from currents in microfabricated gold conductors, are used to create a position-specific Larmor frequency of the NV ground state spins. Measuring this frequency by pulsed optical-microwave spectroscopy, we determine the position of each NV center in 3D.

I will report on fabrication of the device, based on a liftoff process and maskless lithography, as well as the geometry required to create three orthogonal magnetic fields. The measurement protocol for 3D imaging will be discussed, as well as hardware and software means to reduce the shot-to-shot field variation, caused by electrical noise, down to 0.1%. This level of stability enabled us to demonstrate 3D imaging with around 5 nm spatial resolution. I will conclude with an outlook addressing how the resolution can be further improved by reducing the dimensions of the micro wires, and how it could be extended to image spins deposited on the diamond surface.

[1] Arai, K. et al. Nat. Nanotechnol. 10 (2015)