Excited-State Spectroscopy Using Single Spin Manipulation in Diamond

Fuchs, Gregory D.; Dobrovitski, V. V.; Hanson, Ronald K.; Batra, A.; Weis, Christoph; Schenkel, T.; Awschalom, D. D.

doi:10.1103/physrevlett.101.117601

Cited by 194 publications

(205 citation statements)

References 26 publications

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“…In the absence of a magnetic field, the ground state m s = 0 spin sublevel lies 2.87 GHz below the m s = ±1 levels; in the presence of a magnetic field, the NV spin gyromagnetic ratio is extremely close to that of the bare electron. The optically excited state of the NV defect likewise has an S = 1 configuration with the same quantization axis and similar gyromagnetic ratio, but its room temperature zero-field splitting is only 1.42 GHz [20] (see Fig. 1a).…”

Section: Multifrequency Excitation Of the Nv Center In Diamondmentioning

confidence: 99%

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Multifrequency spin resonance in diamond

Childress

McIntyre

2010

Phys. Rev. A

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Magnetic resonance techniques provide a powerful tool for controlling spin systems, with applications ranging from quantum information processing to medical imaging. Nevertheless, the behavior of a spin system under strong excitation remains a rich dynamical problem. In this paper, we examine spin resonance of the nitrogen-vacancy center in diamond under conditions outside the regime where the usual rotating wave approximation applies, focusing on effects of multifrequency excitation and excitation with orientation parallel to the spin quantization axis. Strong-field phenomena such as multiphoton transitions and coherent destruction of tunneling are observed in the spectra and analyzed via numerical and analytic theory. In addition to illustrating the response of a spin system to strong multifrequency excitation, these observations may inform techniques for manipulating electron-nuclear spin quantum registers.

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Section: Multifrequency Excitation Of the Nv Center In Diamondmentioning

confidence: 99%

“…1a). While electron spin resonance (ESR) has been observed in the excited state [8,20], the fast optical decay time τ ∼ 12 ns [18] limits the resolution of such experiments, and the experiments discussed below involve spin resonance in the ground state configuration.…”

Section: Multifrequency Excitation Of the Nv Center In Diamondmentioning

confidence: 99%

Multifrequency spin resonance in diamond

Childress

McIntyre

2010

Phys. Rev. A

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“…This diminishment is due to the deactivation of the dynamic Jahn-Teller effect, in which phonons motionally narrow pairs of ES electronic orbitals into a single coherent spin resonance [57][58][59]. In SiC, at T ¼ 5 K, the base temperature of our cryostat, we observe both a coherent ES spin resonance [ Figs.…”

Section: H Y S I C a L R E V I E W L E T T E R Smentioning

confidence: 99%

Polarizing Nuclear Spins in Silicon Carbide

Cappellaro

2015

Physics

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We demonstrate optically pumped dynamic nuclear polarization of 29 Si nuclear spins that are strongly coupled to paramagnetic color centers in 4H-and 6H-SiC. The 99% AE 1% degree of polarization that we observe at room temperature corresponds to an effective nuclear temperature of 5 μK. By combining ab initio theory with the experimental identification of the color centers' optically excited states, we quantitatively model how the polarization derives from hyperfine-mediated level anticrossings. These results lay a foundation for SiC-based quantum memories, nuclear gyroscopes, and hyperpolarized probes for magnetic resonance imaging. DOI: 10.1103/PhysRevLett.114.247603 PACS numbers: 76.70.Fz, 61.72.jn, 71.55.-i, 76.30.Mi Silicon carbide is a promising material for quantum electronics at the wafer scale. It is both an industrially important substrate for high-performance electronic devices [1] and a host to several types of vacancy-related paramagnetic color centers with remarkable attributes . Much like the diamond nitrogen-vacancy center [24,25], these color centers have electronic spin states that can be addressed at either ensemble or single-spin levels [18,19] through optically detected magnetic resonance (ODMR). Moreover, spin coherence times can exceed 1 ms [18], and ODMR can persist up to room temperature [10,11,14,19]. Although the fluctuating nuclear spin bath is a principal source of electronic spin decoherence in these types of systems [26], nuclear spins in SiC are not purely detrimental. If polarized and controlled, they would be a technologically valuable resource.In this Letter, we show that near-infrared light can nearly completely polarize populations of 29 Si nuclear spins in SiC. In this dynamic nuclear polarization (DNP) [27,28] process, the optically pumped polarization of electron spins bound to either neutral divacancy [4,5,8,10,14] or PL6 [10,14,16] color centers is transferred to proximate nuclei via the hyperfine interaction. Optically polarizing nuclei in SiC is experimentally straightforward, requiring only broadband illumination and a small external magnetic field (300-500 G), with which we tune color-center ensembles to their ground-state (GS) or excited-state (ES) spin-level anticrossings (the GSLAC and ESLAC, respectively). Optically pumping crystals has previously led to roomtemperature DNP in napthalene [29], diamond [30][31][32][33][34][35], and GaNAs [36]. Our results show that room-temperature DNP can be efficiently driven in a material that plays a leading role in the semiconductor industry.We find that SiC color centers can mediate a high degree (>85%) of ESLAC-derived nuclear polarization from at least 5 to 298 K, a surprisingly broad temperature range for this mechanism. This robust DNP could be applied to initialize quantum memories in quantumcommunication technologies, especially since the color centers are telecom-range emitters, with narrow optical linewidths at low temperatures [16,21,37]. Other applications of DNP, including solid-state nuclear gyroscopes [38,39...

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“…By applying a small magnetic field, the magnetic dipole moment of the NV causes the states |±1 to split. The optically excited state of the NV defect also has the triplet S = 1 configuration, oriented along the same quantization axis and with similar magnetic moment, but its room temperature zero-field splitting is only 2π(1.42) GHz 16,17 .…”

Section: Diamond Quantum Magnetometrymentioning

confidence: 99%

Optimizing phase-estimation algorithms for diamond spin magnetometry

Nusran

Dutt

2014

Phys. Rev. B

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We present a detailed theoretical and numerical study discussing the application and optimization of phase estimation algorithms (PEAs) to diamond spin magnetometry. We compare standard Ramsey magnetometry, the non-adaptive PEA (NAPEA) and quantum PEA (QPEA) incorporating error-checking. Our results show that the NAPEA requires lower measurement fidelity, has better dynamic range, and greater consistency in sensitivity. We elucidate the importance of dynamic range to Ramsey magnetic imaging with diamond spins, and introduce the application of PEAs to time-dependent magnetometry.

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Excited-State Spectroscopy Using Single Spin Manipulation in Diamond

Cited by 194 publications

References 26 publications

Multifrequency spin resonance in diamond

Multifrequency spin resonance in diamond

Polarizing Nuclear Spins in Silicon Carbide

Optimizing phase-estimation algorithms for diamond spin magnetometry

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