Related papers: Influence of Platinum Thin Films on the Photophysical and Quantum Properties of Near-Surface NV Centers

Influence of Platinum Thin Films on the Photophysical and Quantum Properties of Near-Surface NV Centers

URL: http://arxiv.org/abs/2510.11721v1
Date: Tue, 30 Sep 2025 21:08:46 GMT
Title: Influence of Platinum Thin Films on the Photophysical and Quantum Properties of Near-Surface NV Centers
Authors: Joachim P. Leibold, Lina M. Todenhagen, Matthias Althammer, Nikhita Khera, Elke Neu, Martin S. Brandt, Hans Huebl, Dominik B. Bucher,
Abstract summary: Nitrogen-vacancy (NV) centers in diamond are optically addressable spin defects with great potential for nanoscale quantum sensing.<n>In this work, we study five platinum-covered diamond samples containing shallow NVs created via nitrogen with different energies (2.5-60 keV)<n>We find a substantial reduction of the photoluminescence lifetime and a pronounced decrease of NV$-$ population for NV ensembles located near the platinum layer.
Score: 0.06667718450797101
License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
Abstract: Nitrogen-vacancy (NV) centers in diamond are optically addressable spin defects with great potential for nanoscale quantum sensing. A key application of NV centers is the detection of external spins at the diamond surface. Among metals, platinum thin films - widely used in spintronics, catalysis and electrochemistry - provide a particularly interesting system for such studies. However, the interaction between NV centers and metals is known to affect their quantum sensing capabilities. In this work, we study five platinum-covered diamond samples containing shallow NVs created via nitrogen implantation with different energies (2.5-60 keV) and investigate the optical and quantum properties of NV ensembles beneath the metal films. We find a substantial reduction of the photoluminescence lifetime and a pronounced decrease of the NV$^{-}$ population for NV ensembles located near the platinum layer. As a result, optically detected magnetic resonance experiments could only be efficiently performed on diamonds implanted with at least 20 keV, where we observed a strong increase in the T$_{2}$ coherence time beneath the platinum thin films. Our study describes the various processes affecting NV centers near platinum films and provides guidance for the integration of thin metal films with near-surface NV centers.

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