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Flinn, G.P.; Jang, Kiwan; Ganem, Joseph; Jones, M. L.; Meltzer, R. S.; Macfarlane, R. M.

doi:10.1103/physrevb.49.5821

Cited by 52 publications

(56 citation statements)

References 19 publications

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“…[27][28][29] The extrapolated zero power homogeneous linewidths are Γ h = 7.5 ± 0.2 kHz (corresponding to a coherence lifetime T 2 = 1/(πΓ h ) of 42 µs) at 3.5 K. The same value was found for the 1.0% sample without additives, while the 0.5% sample with additives showed a slightly larger homogeneous linewidth of 9.2 ± 0.6 kHz (T 2 = 35 µs). Even though those homogeneous linewidths are still about one order of magnitude larger than that observed in the very best crystal known (Γ h = 760 Hz), 20 they are in the lower range of values observed for Eu 3+ :Y 2 O 3 crystals (Γ h = 2.4 − 42 kHz 19 ) and considerably narrower than that previously reported in transparent ceramics Γ h = 59 kHz. 12 The contribution to the homogeneous linewidth Γ h from the excited state population is given by Γ pop = 1/(2πT 1 ).…”

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confidence: 50%

“…The excited-state lifetimes measured in the ceramic samples (Table I) are similar to those reported for single crystals. 19 Thus, Γ pop is less than 200 Hz and therefore much smaller than the observed Γ h . Other possible contributions to Γ h are dynamic structural fluctuations due to tunneling between configurations with nearly equal energy referred to as two-level systems (TLSs).…”

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confidence: 99%

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Rare-earth doped transparent ceramics for spectral filtering and quantum information processing

et al. 2015

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Homogeneous linewidths below 10 kHz are reported for the first time in high-quality Eu3+ doped Y 2O3 transparent ceramics. This result is obtained on the 7F0→5D0 transition in Eu3+ doped Y 2O3 ceramics and corresponds to an improvement of nearly one order of magnitude compared to previously reported values in transparent ceramics. Furthermore, we observed spectral hole lifetimes of ∼15 min that are long enough to enable efficient optical pumping of the nuclear hyperfine levels. Additionally, different Eu3+ concentrations (up to 1.0%) were studied, resulting in an increase of up to a factor of three in the peak absorption coefficient. These results suggest that transparent ceramics can be useful in applications where narrow and deep spectral holes can be burned into highly absorbing lines, such as quantum information processing and spectral filteringThis work was supported by the ANR projects RAMACO (No. 12-BS08-0015-01) and DISCRYS (No. 14-CE26-0037-01), Idex No. ANR-10-IDEX-0001-02 PSL⋆, and Nano’K project RECTUS. C.W.T. and R.L.C. acknowledge support from National Science Foundation (NSF) Award Nos. CHE-1416454 and PHY-1415628 and M.O.R. and L.E.B. from Project No. MAT2013- 43301-R of the Spanish Ministry of Economy and Competitiveness (MINECO) and Comunidad Autónoma de Madrid under Grant No. S2013/MIT-274

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Rare-earth doped transparent ceramics for spectral filtering and quantum information processing

et al. 2015

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“…It has been proposed that low densities of TLS can be present in some crystalline materials with large inhomogeneous lattice strains [68]. Decoherence attributed to TLS has been previously observed in both bulk crystals [29,59] and powders [30], and it has also been suggested that TLS can cause rapid electron spin relaxation [69]. This interpretation is also consistent with past observations of increased electronic spin-lattice relaxation rates of Nd 3+ in YAG single crystals with a high density of structural defects in the lattice [70] as well as increased nuclear spin relaxation rates of 169 Tm 3+ in YAG powders fabricated by ball milling [49].…”

Section: Magnetic Field Dependence Of Coherence Lifetimesmentioning

confidence: 99%

“…Therefore, the usual characterization methods employed for REI-doped crystals such as 2PE, SHB, or FID are difficult to perform with powders. Previous measurements on powders have mostly employed detection of fluorescence emission to observe SHB [29,31,59], with direct transmission detection of SHB [49] and 2PE [36,37] only recently being successfully applied to powders. In particular, FID measurements on powders have not been previously reported to our knowledge.…”

Section: Optical Coherence Lifetime Measurementsmentioning

confidence: 99%

“…The initial work in this field focused on the specific case of Eu 3+ -doped into sesquioxide host crystals, where fluorescence detection of spectral hole burning revealed rapid decoherence relative to the bulk crystals due to the introduction of glass-like two-level system (TLS) dynamics in the powders [29][30][31][32]. Beyond the sesquioxide powders, nano-crystallites in glass ceramics have also suffered from rapid decoherence processes due primarily to interactions with the surrounding amorphous host matrix [33][34][35].…”

Section: Arxiv:170105908v1 [Cond-matmtrl-sci] 20 Jan 2017mentioning

confidence: 99%

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Effects of mechanical processing and annealing on optical coherence properties ofEr3+:LiNbO3 powders

Lutz

Veissier

Thiel

et al. 2017

Journal of Luminescence

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Optical coherence lifetimes and decoherence processes in erbium-doped lithium niobate (Er 3+ :LiNbO3) crystalline powders are investigated for materials that underwent different mechanical and thermal treatments. Several complimentary methods are used to assess the coherence lifetimes for these highly scattering media. Direct intensity or heterodyne detection of two-pulse photon echo techniques was employed for samples with longer coherence lifetimes and larger signal strengths, while time-delayed optical free induction decays were found to work well for shorter coherence lifetimes and weaker signal strengths. Spectral hole burning techniques were also used to characterize samples with very rapid dephasing processes. The results on powders are compared to the properties of a bulk crystal, with observed differences explained by the random orientation of the particles in the powders combined with new decoherence mechanisms introduced by the powder fabrication. Modeling of the coherence decay shows that paramagnetic materials such as Er 3+ :LiNbO3 that have highly anisotropic interactions with an applied magnetic field can still exhibit long coherence lifetimes and relatively simple decay shapes even for a powder of randomly oriented particles. We find that coherence properties degrade rapidly from mechanical treatment when grinding powders from bulk samples, leading to the appearance of amorphous-like behavior and a broadening of up to three orders of magnitude for the homogeneous linewidth even when low-energy grinding methods are employed. Annealing at high temperatures can improve the properties in some samples, with homogeneous linewidths reduced to less than 10 kHz, approaching the bulk crystal linewidth of 3 kHz under the same experimental conditions.

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

Kunkel

Goldner

2017

Zeitschrift anorg allge chemie

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Sample-dependent optical dephasing in bulk crystalline samples ofY2O3

Cited by 52 publications

References 19 publications

Rare-earth doped transparent ceramics for spectral filtering and quantum information processing

Rare-earth doped transparent ceramics for spectral filtering and quantum information processing

Effects of mechanical processing and annealing on optical coherence properties ofEr3+:LiNbO3 powders

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

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