Optically detected adiabatic fast passage and cross-relaxation of the N-V center in diamond

Oort, Eric van; Glasbeek, M.

doi:10.1007/bf03166042

Cited by 12 publications

(15 citation statements)

References 23 publications

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“…Such perturbation is possible because there is indeed an energy match between the hyperfine levels of the N S (or NV 0 ) and the | þ 1S2| À 1S sublevels of the NV À centre 17 . Although the | þ 1S2| À 1S transition cannot be directly induced by application of microwaves (MWs) due to the selection rule (Dm S ¼ ± 1), cross-relaxation between the NV À and N S centres via the | þ 1S and | À 1S sublevels at weak magnetic field is an established process that has been thoroughly studied, both experimentally and theoretically 17,18,[31][32][33][34] .…”

Section: Resultsmentioning

confidence: 99%

“…Cross-relaxation can occur among almost any two spin systems as long as there is an energy matching condition, such as between two subensembles of NV À centres at zero field, between the NV À and N S centres at weak magnetic field, and between magnetically inequivalent or equivalent NV À centres at certain values of the strength and angle of the applied magnetic field 17,18,[31][32][33][34] . Cross-relaxation between two spin systems occurs when energy exchange between two systems provides additional spin-lattice relaxation pathways for both systems.…”

Section: Resultsmentioning

confidence: 99%

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Optically detected cross-relaxation spectroscopy of electron spins in diamond

et al. 2014

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The application of magnetic resonance spectroscopy at progressively smaller length scales may eventually permit 'chemical imaging' of spins at the surfaces of materials and biological complexes. In particular, the negatively charged nitrogen-vacancy (NV À ) centre in diamond has been exploited as an optical transducer for nanoscale nuclear magnetic resonance. However, the spectra of detected spins are generally broadened by their interaction with proximate paramagnetic NV À centres through coherent and incoherent mechanisms. Here we demonstrate a detection technique that can resolve the spectra of electron spins coupled to NV À centres, in this case, substitutional nitrogen and neutral nitrogen-vacancy centres in diamond, through optically detected cross-relaxation. The hyperfine spectra of these spins are a unique chemical identifier, suggesting the possibility, in combination with recent results in diamonds harbouring shallow NV À implants, that the spectra of spins external to the diamond can be similarly detected.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Optically detected cross-relaxation spectroscopy of electron spins in diamond

et al. 2014

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“…As described elsewhere, the magnetic contributions are highly dependent on the static magnetic field, 74,75,[78][79][80] but are essentially temperature independent for temperatures > 20 K, due to the impurity spins easily reaching equal Boltzmann populations of their spin sublevels at low temperatures. 73 The spin-lattice contributions are instead weakly dependent on the static fields, but have distinct functions of temperature that arise from different interactions with lattice vibrations.…”

Section: Spin Relaxation and Dephasingmentioning

confidence: 90%

“…The contributions to relaxation and dephasing arising from interactions with magnetic impurities, including their dependence on the static magnetic field, has been studied in some detail for NV spins in both type-Ib and type-IIa diamond. 3,[72][73][74][75][76][77][78][79][80] The additional influence of electric-strain fields on these interactions has not yet been studied and this will be the subject of future work. In this section, the contributions to relaxation and dephasing arising from the spin's interaction with lattice vibrations will be theoretically developed.…”

Section: Spin Relaxation and Dephasingmentioning

confidence: 99%

Theory of the ground-state spin of the NV−center in diamond

et al. 2012

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The ground-state spin of the negatively charged nitrogen-vacancy center in diamond has been the platform for the recent rapid expansion of new frontiers in quantum metrology and solid-state quantum-information processing. However, in spite of its many outstanding demonstrations, the theory of the spin has not yet been fully developed, and there do not currently exist thorough explanations for many of its properties, such as the anisotropy of the electron g factor and the existence of Stark effects and strain splittings. In this work, the theory of the ground-state spin is fully developed using the molecular orbital theory of the center in order to provide detailed explanations for the spin's fine and hyperfine structures and its interactions with electric, magnetic, and strain fields. Given these explanations, a general solution is obtained for the spin in any given electric-magnetic-strain field configuration, and the effects of the fields on the spin's coherent evolution, relaxation, and inhomogeneous dephasing are examined. Thus, this work provides the essential theoretical tools for the precise control and modeling of this remarkable spin in its current and future applications.

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“…Just to provide two examples: A study of cross relaxation of N-V centers in diamond was performed (5). During laser pumping the microwave frequency is swept rapidly (adiabatic fast passage) through resonance producing population inversion in the ground triplet spin state.…”

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confidence: 99%

FROM 10¹⁰ SPINS TO A SINGLE SPIN.

Manassen¹,

Ovanesyan²,

Shachal³

1998

Foundations of Modern EPR

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It is widely accepted that the upper sensitivity limit in conventional (CW Xband) ESR is 10 10 electron spins. There are two basic reasons for this relatively small sensitivity: The first one is the small thermal population difference. The second reason is the fact that low energy photons are detected which leads to small detector efficiency and to relatively high thermal noise level. While optical photons can be detected with an efficiency near unity, many microwave photons are required to exceed the noise level. In the first part of this chapter, a very brief and partial description of the different solutions to the sensitivity problem will be given.The sensitivity can be improved by approximately five orders of magnitude if the detection is done via optical photons instead of microwave ones. This is due to both an increase in the spin polarization and to the detection of high energy photons. The most commonly used microwave -optical double resonance experiment is ODMR -optical detection of magnetic resonance. The first such experiment was performed in the vapor phase, using the 3 P) state of mercury atoms (1) and in the solid state in a single crystal of ruby(2). Later, these experiments were performed many times on molecular crystals and semiconductors. In the following discussion, ODMR of molecules is assumed unless mentioned otherwise. Upon laser irradiation, the ground singlet molecules (S 0 ) are pumped into the excited singlet state (Si). The molecules can either emit a photon while returning to So (fluorescence), or perform intersystem crossing into the lowest triplet state (TO. From T! they can decay back to S 0 either by radiationless intersystem crossing or by photon emission (phosphorescence). In zero external magnetic field, Ti is split into three zero field components (T x , T y and Tz). x, y and z corresponds to the principal axes of the molecule. Upon application of a magnetic field the splitting is changed.The non-Boltzmann spin polarization which is built between T X) T y and T z is due to spin selective intersystem crossing, into and from the different triplet sublevels. In principle, intersystem crossing is spin forbidden. However, it can be partially allowed by mixing between the singlet and the triplet states due to spinorbit coupling. The mixing is not equal in all the triplet sublevels, and as a result the intersystem crossing rates to the different triplet sublevels are entirely different. The different rates (including phosphorescence) give rise to a large spin polarization only if the spin lattice relaxation between the triplet sublevels is slow enough. 781 Foundations of Modern EPR Downloaded from www.worldscientific.com by NANYANG TECHNOLOGICAL UNIVERSITY on 10/05/15. For personal use only.

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Optically detected adiabatic fast passage and cross-relaxation of the N-V center in diamond

Cited by 12 publications

References 23 publications

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Theory of the ground-state spin of the NV−center in diamond

FROM 10¹⁰ SPINS TO A SINGLE SPIN.

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Optically detected adiabatic fast passage and cross-relaxation of the N-V center in diamond

Cited by 12 publications

References 23 publications

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Optically detected cross-relaxation spectroscopy of electron spins in diamond

Theory of the ground-state spin of the NV−center in diamond

FROM 1010 SPINS TO A SINGLE SPIN.

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Resources

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FROM 10¹⁰ SPINS TO A SINGLE SPIN.