Localized Nitrogen-Vacancy centers generated by low-repetition rate fs-laser pulses

Abstract

Among hundreds of impurities and defects in diamond, the nitrogen-vacancy (NV) center is one of the most interesting to be used as a platform for quantum technologies and nanosensing. Traditionally, synthetic diamond is irradiated with high-energy electrons or nitrogen ions to generate these color-centers. For precise positioning of the NV centers, fs-laser irradiation has been proposed as an alternative approach to produce spatially localized NV centers in diamond. However, most of the studies reported so far used high-repetition rate fs-laser systems. Here, we studied the influence of the irradiation conditions on the generation of NV${}^{-}$. Specifically, we varied pulse fluence, laser focusing, and the number of pulses upon irradiation with 150 fs pulses at 775 nm from a Ti:sapphire laser amplifier operating at 1 kHz repetition rate. Optically Detected Magnetic Resonance (ODMR) was used to investigate the produced NV centers, revealing a sizeable zero-field splitting in the spectra and indicating the conditions in which the lattice strain produced in the ablation process may be deleterious for quantum information applications.

arXiv comment15 pages, 6 figures

References in corpus (18)

• The nitrogen-vacancy colour centre in diamond
• Heralded entanglement between solid-state qubits separated by 3 meters
• Observation of coherent oscillation of a single nuclear spin and realization of a two-qubit conditional quantum gate
• Room temperature coherent control of coupled single spins in solid
• Properties of nitrogen-vacancy centers in diamond: group theoretic approach
• Laser writing of coherent colour centres in diamond
• High sensitivity magnetic imaging using an array of spins in diamond
• Quantum imaging of current flow in graphene
• Optical properties of the nitrogen-vacancy singlet levels in diamond
• Implantation of labelled single nitrogen vacancy centers in diamond using 15N
• Fabrication of Diamond Nanowires for Quantum Information Processing Applications
• Diamond photonics platform enabled by femtosecond laser writing
• Wide-Field Strain Imaging with Preferentially-Aligned Nitrogen-Vacancy Centers in Polycrystalline Diamond
• Nonlinear optical spectrum of diamond at femtosecond regime
• Effects of low energy electron irradiation on formation of nitrogen-vacancy centers in single-crystal diamond
• Nanoscale magnetometry through quantum control of nitrogen-vacancy centres in rotationally diffusing nanodiamonds
• Second-Harmonic Generation in Bulk Diamond Based on Inversion Symmetry Breaking by Color Centers
• Local formation of nitrogen-vacancy centers in diamond by swift heavy ions