Coherent population oscillations with nitrogen-vacancy color centers in diamond

Abstract

We present results of our research on two-field (two-frequency) microwave spectroscopy in nitrogenvacancy (NV -) color centers in a diamond. Both fields are tuned to transitions between the spin sublevels of the NV -ensemble in the 3 A 2 ground state (one field has a fixed frequency while the second one is scanned). Particular attention is focused on the case where two microwaves fields drive the same transition between two NV -ground state sublevels (m s =0  m s =+1). In this case, the observed spectra exhibit a complex narrow structure composed of three Lorentzian resonances positioned at the pump-field frequency. The resonance widths and amplitudes depend on the lifetimes of the levels involved in the transition. We attribute the spectra to coherent population oscillations induced by the two nearly degenerate microwave fields, which we have also observed in real time. The observations agree well with a theoretical model and can be useful for investigation of the NV relaxation mechanisms.

Continuous microwave hole burning and population oscillations in a diamond spin ensemble

“…Unlike the measurements presented in Ref. [17] where the onset of POs are observed at beat-frequencies in the order of kHz, the measured PO here is observed only at much slower beat frequencies within 20 Hz. Based on the model fitting parameters, this is deduced to be partly a result of the low effective excitation rates due to a large density of non-N-V − radiation-absorbing centres.…”

“…As discussed in Ref. [17], the shape and features of these oscillations across both dimensions (time and ∆ ω ) is set by both the measurement parameters and the intrinsic coherence times for the subensemble targeted by the probe field. These features and their relationships may be understood by attempting to reproduce the trends using a typical five-level model of the N-V − system [24,[27][28][29], while accounting for two coherent drives for the single ground state spin transition:…”

Excitation and coherent control of spin qudit modes in silicon carbide at room temperature

“…The ODMR resonance without the pump MW field (black curve) reveals the zero-field spin splitting 2 D = 26.8 MHz between the Kramers doublets ±1/2 and ±3/2 states, whereas the sign of D determining the ordering of the Kramers doublets, is negative 12 . Application of a strong, pump MW field at v pump = 26.8 MHz saturates the spin transitions, that is seen as a spectral hole burning 26,27 . To model it, we assume that the ODMR resonance is inhomogeneously broadened and agregates many homogeneous spin packets with different resonance frequencies, as schematically shown by thin lines in Fig.…”

Наблюдение Когерентных Осцилляций Населенности NV-центров В Алмазе В Микроволновом Диапазоне

“…В микроволновом диапазоне при комнатной температуре наблюдались эффекты когерентного пленения населенности [10,11], Аутлера-Таунса [12,13]. С точки зрения изучения динамики NVцентров предлагается наблюдение выжигания спектраль-ных провалов [14,15] и когерентных осцилляций населенности [16,17].…”