Related papers: Spectroscopy of photoionization from the $^1E$ singlet state in nitrogen$-$vacancy centers in diamond

Spectroscopy of photoionization from the $^1E$ singlet state in nitrogen$-$vacancy centers in diamond

URL: http://arxiv.org/abs/2301.10383v2
Date: Mon, 26 Feb 2024 15:42:35 GMT
Title: Spectroscopy of photoionization from the $^1E$ singlet state in nitrogen$-$vacancy centers in diamond
Authors: Sean M. Blakley, Thuc T. Mai, Stephen J. Moxim, Jason T. Ryan, Adam J. Biacchi, Angela R. Hight Walker, Robert D. McMichael
Abstract summary: We report on the energy gap between the $1E-1A$ singlet manifold and the $3A$ and $3E$ ground and excited triplet states. A temperature-dependent threshold between 532 nm and 550 nm was found, locating the singlet states within the diamond band gap.
Score: 0.0
License: http://creativecommons.org/licenses/by/4.0/
Abstract: The $^1E-^1A_1$ 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 $^3A_2-^3E$ triplet manifold has not been measured directly. Using field-quenching effects on photoluminescence (PL) spectra, we report on the energy gap between the $^1E-^1A_1$ singlet manifold and the $^3A_2$ 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 $NV^0$ 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.

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