Recent Advances in Rare Earth Doped Inorganic Crystalline Materials for Quantum Information Processing

Kunkel, Nathalie; Goldner, Philippe

doi:10.1002/zaac.201700425

Cited by 39 publications

(22 citation statements)

References 122 publications

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“…The SiC samples were co-implanted with 52 Cr at 190 keV energy with a dose of 5x10 11 cm -2 , and 12 C at 100 keV energy with a dose of 5x10 11 capped, and annealed at 1800 °C for 15 minutes using the same procedures detailed above. For spectrally resolved measurements a liquid nitrogen cooled InGaAs NIR camera with a spectrometer (Princeton Instruments) is used.…”

Section: Sample Preparationmentioning

confidence: 99%

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

et al. 2020

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Transition metal ions provide a rich set of optically active defect spins in wide bandgap semiconductors. Chromium (Cr 4+ ) in silicon-carbide (SiC) produces a spin-1 ground state with a narrow, spectrally isolated, spin-selective, near-telecom optical interface. However, previous studies were hindered by material quality resulting in limited coherent control. In this work, we implant Cr into commercial 4H-SiC and show optimal defect activation after annealing above 1600 o C. We measure an ensemble optical hole linewidth of 31 MHz, an order of magnitude improvement compared to as-grown samples. An in-depth exploration of optical and spin dynamics reveals efficient spin polarization, coherent control, and readout with high fidelity (79%). We report T1 times greater than 1 s at cryogenic temperatures (15 K) with a T2 * = 317 ns and a T2 = 81 μs, where spin dephasing times are currently limited by spin-spin interactions within the defect ensemble. Our results demonstrate the potential of Cr 4+ in SiC as an extrinsic, optically active spin qubit.

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Section: Sample Preparationmentioning

confidence: 99%

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

et al. 2020

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“…The fast moving field of lanthanide‐containing luminescent nanoparticles has been the subject of many recent reviews covering subjects as diverse as fundamental properties, synthesis, biosensing, bioimaging, drug delivery and theranostics, as well as persistent luminescence nanoparticles, NIR‐emitting nanoparticles, and forensic or other applications . The present review focuses on biological/medical applications and on lighting/displays, two main sectors in which nanomaterials have brought significant advances recently.…”

Section: Introductionmentioning

confidence: 99%

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

Zhou

Leaño

Liu³

et al. 2018

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Half a century after its initial emergence, lanthanide photonics is facing a profound remodeling induced by the upsurge of nanomaterials. Lanthanide-doped nanomaterials hold promise for bioapplications and photonic devices because they ally the unmatched advantages of lanthanide photophysical properties with those arising from large surface-to-volume ratios and quantum confinement that are typical of nanoobjects. Cutting-edge technologies and devices have recently arisen from this association and are in turn promoting nanophotonic materials as essential tools for a deeper understanding of biological mechanisms and related medical diagnosis and therapy, and as crucial building blocks for next-generation photonic devices. Here, the recent progress in the development of nanomaterials, nanotechnologies, and nanodevices for clinical uses and commercial exploitation is reviewed. The candidate nanomaterials with mature synthesis protocols and compelling optical uniqueness are surveyed. The specific fields that are directly driven by lanthanide doped nanomaterials are emphasized, spanning from in vivo imaging and theranostics, micro-/nanoscopic techniques, point-of-care medical testing, forensic fingerprints detection, to micro-LED devices.

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“…Applications of rare earth-doped inorganic materials are manifold, ranging from solid state lighting to scintillators, lasers, biomedical applications, multiphoton processes, temperature sensing, quantum information technology and many more. [1][2][3][4][5][6][7][8][9][10][11] Especially the 4f n-1 5d-4f n transitions of Eu 2+ (n = 7) and Ce 3+ (n = 1) are of great importance for phosphors used in phosphor-converted light-emitting diodes (pc-LEDs). 1,4,12,13 They usually show high emission intensities and also a strong dependence of the emission energy on the host material.…”

Section: Introductionmentioning

confidence: 99%

One Ion, Many Facets: Efficient, Structurally and Thermally Sensitive Luminescence of Eu²⁺ in Binary and Ternary Strontium Borohydride Chlorides

et al. 2019

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The Eu 2+ -doped mixed alkaline metal strontium borohydride chlorides ASr(BH4)3-xClx (A = K, Rb, Cs) and Eu 2+ -doped strontium borohydride chloride Sr(BH4)2-xClx have been prepared by mechanochemical synthesis. Intense blue photoluminescence for Sr(BH4)2-xClx (λem= 457 nm) and cyan photoluminescence for the perovskite-type mixed alkaline metal strontium borohydride chlorides ASr(BH4)3-xClx (A = K, Rb, Cs) (λem = 490 nm) is already observable after short milling times. Temperature dependent luminescence measurements reveal an appreciable blue shift with increasing temperature for all ASr(BH4)3-xClx (A = K, Rb, Cs) until 500 K. This extremely large shift, caused by structural relaxation, as well as the vibrationally induced emission band broadening can serve as a sensitive response signal for temperature sensing, and this unique behavior has, to the best of our knowledge, not been reported in any Eu 2+ doped phosphor so far. Additionally, bright luminescence, high quantum efficiencies, and very low thermal quenching of these Eu 2+ -doped borohydrides show that such host materials could serve in solid state lighting applications. xClx:Eu 2+ (A = K, Rb, Cs) for the first time. All discussed ternary compounds show efficient cyan emission at room temperature as well as a strongly temperature-dependent shift of the emission energies. This unusually strong response of the luminescence properties of Eu 2+ with Chemistry of Materials 2019, 31, 8957-8968 https://doi.org/10.1021/acs.chemmater.9b03048regard to temperature changes may be interesting for potential applications in the field of thermometry. Experimental sectionSynthesis. Due to moisture and air sensitivity all compounds were handled in an argon-filled glove box. The mixed metal borohydrides ASr(BH4)3-xClx:Eu 2+ (A = K, Rb, Cs) were prepared via mechanochemical reaction of LiBH4 (Alfa Aesar, 95%), SrCl2 (Alfa Aesar, 99.995%), the corresponding alkaline borohydrides (KBH4, Alfa Aesar 98%; RbBH4 and CsBH4 prepared from Rb or Cs metal and NaBH4 in ethanol according to the procedure described in Ref 34) as well as EuH2 (2 mol% doping; synthesized via hydrogenation of europium metal in an autoclave made from hydrogen-resistant Böhler L718 alloy) in a Fritsch Pulverisette Premium Line 7 in a ZrO2 bowl with an overpressure valve. Sr(BH4)2-xClx:Eu 2+ was prepared via mechanochemical reaction of stoichiometric amounts of SrCl2, LiBH4 and 2 mol% EuH2. 10 ZrO2 balls with a diameter of 10 mm are used together with approximately 0.3 g of reactants. Caution! Overpressure may build up during milling via decomposition of the borohydrides. Reactants were milled during 19 cycles with 2 minutes of milling at 600 rpm followed by 3 minutes pauses to prevent heating of the samples. To increase crystallinity, the samples were annealed at 200 °C in fused silica ampoules for 2 days. Powder x-ray diffraction (XRD). For powder XRD analysis, a STOE STADI P diffractometer (Cu-Kα1 radiation, λ = 1.54051 Å (determined from a silicon standard)), Ge-(111)monochromator) including a DECTRIS Mythen...

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Recent Advances in Rare Earth Doped Inorganic Crystalline Materials for Quantum Information Processing

Cited by 39 publications

References 122 publications

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

One Ion, Many Facets: Efficient, Structurally and Thermally Sensitive Luminescence of Eu²⁺ in Binary and Ternary Strontium Borohydride Chlorides

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Recent Advances in Rare Earth Doped Inorganic Crystalline Materials for Quantum Information Processing

Cited by 39 publications

References 122 publications

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

Coherent control and high-fidelity readout of chromium ions in commercial silicon carbide

Impact of Lanthanide Nanomaterials on Photonic Devices and Smart Applications

One Ion, Many Facets: Efficient, Structurally and Thermally Sensitive Luminescence of Eu2+ in Binary and Ternary Strontium Borohydride Chlorides

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Product

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One Ion, Many Facets: Efficient, Structurally and Thermally Sensitive Luminescence of Eu²⁺ in Binary and Ternary Strontium Borohydride Chlorides