2023/01/25 by Sean M. Blakley, Blakley, Sean M., Thuc T. Mai +11
Earth and Planetary Sciences · Materials Science · #Applied Physics (physics.app-ph) #Computational Physics (physics.comp-ph) #Diamond and Carbon-based Materials Research #Electronic and Structural Properties of Oxides #FOS: Physical sciences #High-pressure geophysics and materials #Materials Science (cond-mat.mtrl-sci) #Optics (physics.optics) #Quantum Physics (quant-ph)
paper · pdf · doi:10.48550/arxiv.2301.10383
openalex publication_date 2023/01/25 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
The 1E-1A1 singlet manifold of the negatively charged nitrogen vacancy (NV-) center in diamond plays a central role in the quantum information and quantum sensing applications of the NV- center. However, the energy of this manifold within the diamond bandgap and with respect to the 3A2-3E triplet manifold has not been measured directly. Using field-quenching effects on photoluminescence (PL) spectra, we report on the energy gap between the 1E-1A1 singlet manifold and the 3A2 and 3E ground and excited triplet states of the NV- as a function of excitation wavelength and power, temperature, and applied magnetic field in a heavily nitrogen-doped sample. Increased PL and decreased zero-phonon line width from the NV0 were observed in the presence of an applied magnetic field, indicating ionization from the long-lived 1E singlet state. A temperature-dependent ionization threshold between 532 nm and 550 nm was found, locating the singlet states within the diamond band gap.