Localized nitrogen-vacancy centers generated by low-repetition rate fs-laser pulses

Author(s)

Oncebay, Charlie ; Almeida, Juliana M. P. ; Almeida, Gustavo F. B. ; Muniz, Sergio R. ; Mendonca, Cleber R.

• Document type: Journal article
• Source: DIAMOND AND RELATED MATERIALS; v. 130, p. 6-pg., 2022-10-14.

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 in-formation applications. (AU)

• FAPESP's process: 18/11283-7 - Nonlinear photonics: spectroscopy and advanced processing of materials
• Grantee: Cleber Renato Mendonça
• Support Opportunities: Research Projects - Thematic Grants
• FAPESP's process: 19/27471-0 - Development of new experimental platforms for the study of nanothermodynamics and the information-energy relation in the quantum-classic boundary
• Grantee: Sérgio Ricardo Muniz
• Support Opportunities: Regular Research Grants
• FAPESP's process: 09/54035-4 - Facility for advanced studies of biosystems and nanostructured materials
• Grantee: Igor Polikarpov
• Support Opportunities: Multi-user Equipment Program
• FAPESP's process: 15/17058-7 - Implementation and application of LIFT with femtosecond laser in glasses of high optical nonlinearities
• Grantee: Juliana Mara Pinto de Almeida
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 13/07276-1 - CEPOF - Optics and Photonic Research Center
• Grantee: Vanderlei Salvador Bagnato
• Support Opportunities: Research Grants - Research, Innovation and Dissemination Centers - RIDC