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Журнал технической физики

Наблюдение когерентного пленения населенности в ансамблях NV-центров в алмазе в условиях антипересечения уровней основного состояния

Ахмеджанов Ринат Абдулхаевич, I. V. Zelensky, Л.А. Гущин, В. А. Низов, Н. А. Низов, Д.А. Собгайда

Published Jan 1, 2019• 1 citation
Publisher

Abstract

We realize the coherent population trapping effect in ensembles of diamond NV-centers in the ground state level anticrossing regime when the sample is placed into a strong external magnetic field along the [111] crystal axis.
DOI
10.21883/os.2019.08.48038.67-19

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•Jan 1, 2021•0 citations
В работе исследованы особенности кросс-релаксации в нулевом магнитном поле в ансамблях NV-центров в алмазе. Продемонстрировано, что амплитуда и ширина линии кросс-релаксационного резонанса в нулевом магнитном поле (ZFCR) зависят от концентрации NV-центров и температуры образца. Изучено поведение данного резонанса в продольных и поперечных магнитных полях. Реализованы способы полностью оптической квантовой магнитометрии без применения СВЧ-излучения. Результаты подтверждают перспективность ZFCR для создания компактных магнитных сенсоров
We study coherent population trapping and AC Stark effect using microwave transitions between the sublevels of the ground state of the NV-center. Sublevels with different projections of the nuclear spin of the nitrogen atom are used to implement the -scheme. Dependence of the characteristics of the coherent population trapping dip on the control field frequency and intensity is studied. Various schemes for observing the AC Stark effect are considered. Keywords: NV-center, coherent population trapping, AC Stark.
The nitrogen-vacancy center (NV center) in diamond at magnetic fields corresponding to the ground-state level anticrossing (GSLAC) region gives rise to rich photoluminescence (PL) signals due to the vanishing energy gap between the electron spin states, which enables for a broad variety of environmental couplings to have an effect on the NV center's luminescence. Previous works have addressed several aspects of the GSLAC photoluminescence, however, a comprehensive analysis of the GSLAC signature of NV ensembles in different spin environments at various external fields is missing. Here we employ a combination of experiments and recently developed numerical methods to investigate in detail the effects of transverse electric and magnetic fields, strain, P1 centers, NV centers, and the 13C^{13}\mathrm{C}13C nuclear spins on the GSLAC photoluminescence. Our comprehensive analysis provides a solid ground for advancing various microwave-free applications at the GSLAC, including but not limited to magnetometry, spectroscopy, dynamic nuclear polarization (DNP), and nuclear magnetic resonance (NMR) detection. We demonstrate that not only the most abundant 14NV^{14}\mathrm{NV}14NV center but the 15NV^{15}\mathrm{NV}15NV can also be utilized in such applications.
The nitrogen-vacancy center (NV center) in diamond at magnetic fields corresponding to the ground-state level anticrossing (GSLAC) region gives rise to rich photoluminescence (PL) signals due to the vanishing energy gap between the electron spin states, which enables for a broad variety of environmental couplings to have an effect on the NV center’s luminescence. Previous works have addressed several aspects of the GSLAC photoluminescence, however, a comprehensive analysis of the GSLAC signature of NV ensembles in different spin environments at various external fields is missing. Here we employ a combination of experiments and recently developed numerical methods to investigate in detail the effects of transverse electric and magnetic fields, strain, P1 centers, NV centers, and the 13C nuclear spins on the GSLAC photoluminescence. Our comprehensive analysis provides a solid ground for advancing various microwave-free applications at the GSLAC, including but not limited to magnetometry, spectroscopy, dynamic nuclear polarization (DNP), and nuclear magnetic resonance (NMR) detection. We demonstrate that not only the most abundant 14NV center but the 15NV can also be utilized in such applications.