Shallow NV centers augmented by exploiting n-type diamond

Abstract

Creation of nitrogen-vacancy (NV) centers at the nanoscale surface region in diamond, while retaining their excellent spin and optical properties, is essential for applications in quantum technology. Here, we demonstrate the extension of the spin-coherence time ($T$${}_2$), the stabilization of the charge state, and an improvement of the creation yield of NV centers formed by the ion-implantation technique at a depth of $\sim$15 nm in phosphorus-doped n-type diamond. The longest $T$${}_2$ of about 580 $\mu$s of a shallow NV center approaches the one in bulk diamond limited by the nuclear spins of natural abundant ${}^{13}$C. The averaged $T$${}_2$ in n-type diamond is over 1.7 times longer than that in pure non-doped diamond. Moreover, the stabilization of the charge state and the more than twofold improvement of the creation yield are confirmed. The enhancements for the shallow NV centers in an n-type diamond-semiconductor are significant for future integrated quantum devices.

arXiv comment21 pages, 5 figures, 1 table

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Cited by in corpus (5)

• Single-molecule Scale Magnetic Resonance Spectroscopy using Nitrogen-Vacancy Centers in Diamond
• Dopant-assisted stabilization of negatively charged single nitrogen-vacancy centers in phosphorus-doped diamond at low temperatures
• Low-frequency quantum sensing
• Enhancement of quantum coherence in solid-state qubits via interface engineering
• n-Type diamond synthesized with tert-butylphosphine for long spin coherence times of perfectly aligned NV centers