Coherent spin control of a nanocavity-enhanced qubit in diamond

Li, Luozhou; Schröder, Tim; Chen, Edward H.; Walsh, Michael; Bayn, Igal; Goldstein, Jordan; Gaathon, Ophir; Trusheim, Matthew E.; Lu, Ming; Mower, Jacob; Cotlet, Mircea; Markham, Matthew; Twitchen, Daniel J.; Englund, Dirk

doi:10.1038/ncomms7173

Cited by 181 publications

(201 citation statements)

References 45 publications

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“…This technique is commonly used and can typically reversibly redshift cavity modes by at least 20 nm without degrading their Qs (17,18,22,29). Modes can also be appropriately blueshifted of the ZPL by using previously reported techniques for tuning 4H-SiC cavities (25).…”

Section: Significancementioning

confidence: 99%

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Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Bracher

Zhang

2017

Proc. Natl. Acad. Sci. U.S.A.

103

110

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Point defects in silicon carbide are rapidly becoming a platform of great interest for single-photon generation, quantum sensing, and quantum information science. Photonic crystal cavities (PCCs) can serve as an efficient light–matter interface both to augment the defect emission and to aid in studying the defects’ properties. In this work, we fabricate 1D nanobeam PCCs in 4H-silicon carbide with embedded silicon vacancy centers. These cavities are used to achieve Purcell enhancement of two closely spaced defect zero-phonon lines (ZPL). Enhancements of >80-fold are measured using multiple techniques. Additionally, the nature of the cavity coupling to the different ZPLs is examined.

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Section: Significancementioning

confidence: 99%

“…The Purcell enhancement can be calculated from lifetime measurements using the following relation (16,29,30):…”

Section: Significancementioning

confidence: 99%

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Bracher

Zhang

2017

Proc. Natl. Acad. Sci. U.S.A.

103

110

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“…In the visible region, Q-values tend to be much lower even for ring resonators, and, in this spectral region 1D-PHC cavities maximum Q is 24 000. The maximum coupling of single NV with a 1D-PHC is achieved with a Q = 9900 with a loaded Q = 3000 when strongly coupled to NV 51 , while it appears that the best performance in the direction to operate non-linear quantum optics and integrated optical quantum networks is achieved by entangling SiV color centers in diamond 1D nano-cavities 68 . A combination of these advances has led to optomechanical devices in diamond, and we can foresee novel applications in spin optomechanics where optical and mechanical modes are coupled in the same devices with spin defects; additionally spin control can be achieved in diamond crystals by photonics approach at the expenses of operating at cryogenic temperature.…”

Section: Discussionmentioning

confidence: 99%

“…51 it is reported that the highest F SE = 62 is achieved for a single NV in a 1D-PHC cavity with a measured Q~9900 and V~1.05 · (λ/n) 3 ( Figure 7). A linear increase of the lattice constant from 0.9 · a to a in increments of 0.02 · a per period away from the center, defines the cavity defect state.…”

Section: Phc Cavitiesmentioning

confidence: 99%

Advances in diamond nanofabrication for ultrasensitive devices

Castelletto

Rosa

Blackledge³

et al. 2017

Microsyst Nanoeng

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This paper reviews some of the major recent advances in single-crystal diamond nanofabrication and its impact in nano-and micromechanical, nanophotonics and optomechanical components. These constituents of integrated devices incorporating specific dopants in the material provide the capacity to enhance the sensitivity in detecting mass and forces as well as magnetic field down to quantum mechanical limits and will lead pioneering innovations in ultrasensitive sensing and precision measurements in the realm of the medical sciences, quantum sciences and related technologies. INTRODUCTIONDiamond is an ideal platform for nano-and microfabrication leading to a range of robust sensors. This is due to the outstanding mechanical and wide spectral optical transparency of diamond, combined with biocompatibility and lack of toxicity in both bulk and nanostructures. Moreover, diamond can be fabricated with high purity and control using chemical vapor deposition. However, due to its hardness and cost, some of its applications in nanomechanics, optomechanics and nanophotonics reside mainly in its polycrystalline or nanocrystalline forms, which do not always retain the nuance of the outstanding properties of monocrystalline diamond.A recent review 1 describes diamond optical and mechanical properties compared to other materials currently used for optomechanical components (Si, Si 3 N 4 , SiC, and α-Al 2 O 3 ), showing that, in principle, there are more favorable properties of diamond for nanomechanical and optomechanical realizations. Therefore, a considerable effort has been taking place over the last five years to exploit these properties in a wide spectrum of diamond nanosystems. To date, single crystal diamond utilization for nanomechanical components 2 , (for example, nano electromechanical systems (NEMS) and micro electro-mechanical systems (MEMS)), as well for nanophotonics 3,4 compared to above mentioned materials, has been limited due to its growth requirements. In fact, a single crystal diamond cannot be grown on any other substrate than itself. This prevents wafer-scale processing and it represents a challenge in the application of conventional diamond nanofabrication methods. On the other hand, polycrystalline diamond films, which can be grown in high quality from 4 to 6 inches' wafers 5 , permit to fabricate optomechanical components with quality factors and oscillation frequencies rivaling single crystal diamond 6 .

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“…For quantum information, in contrast, these systems are promising as they potentially form a coherent interface between spins and photons in quantum networks [89]. In our case, waveguide-like structures that channel the NV's broad emission into certain spatial modes and direct the light towards the collection optics (nanopillars; see Figure 5b) seem more suitable mainly due to their broadband operation.…”

Section: Nanostructures For Photonics and Scanning Probe Operationmentioning

confidence: 99%

Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors

et al. 2017

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Individual, luminescent point defects in solids, so-called color centers, are atomic-sized quantum systems enabling sensing and imaging with nanoscale spatial resolution. In this overview, we introduce nanoscale sensing based on individual nitrogen vacancy (NV) centers in diamond. We discuss two central challenges of the field: first, the creation of highly-coherent, shallow NV centers less than 10 nm below the surface of a single-crystal diamond; second, the fabrication of tip-like photonic nanostructures that enable efficient fluorescence collection and can be used for scanning probe imaging based on color centers with nanoscale resolution.

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Coherent spin control of a nanocavity-enhanced qubit in diamond

Cited by 181 publications

References 45 publications

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Selective Purcell enhancement of two closely linked zero-phonon transitions of a silicon carbide color center

Advances in diamond nanofabrication for ultrasensitive devices

Nanoscale Sensing Using Point Defects in Single-Crystal Diamond: Recent Progress on Nitrogen Vacancy Center-Based Sensors

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