Narrow Optical Homogeneous Linewidths in Rare Earth Doped Nanocrystals

Perrot, Armand; Goldner, Ph.; Giaume, Domitille; Lovrić, Marko; Andriamiadamanana, Christian; Gonçalves, Rogéria Rocha; Ferrier, Alban

doi:10.1103/physrevlett.111.203601

Cited by 51 publications

(68 citation statements)

References 39 publications

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“…16 The additional dephasing in the ceramics is therefore attributed to magnetic impurities, e.g., very small amounts of transition metal ions or defects. 12,19,30,31 This is in very good agreement with the presence of electron spin impurities (probably transition metal ions) detected by electron paramagnetic resonance for previous samples 12,32 with larger Γ h . For the samples studied here, these impurities could not be detected, presumably because of the higher purity of the Y 2 O 3 starting material (99.999% vs. 99.99%).…”

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confidence: 89%

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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confidence: 89%

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

et al. 2015

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“…A temperature-dependent broadening of the homogeneous linewidth due to TLS in Eu 3+ :Y 2 O 3 has been observed previously, both in powder and in crystalline fibers. For crystalline domains of 60 nm, α TLS ≈ 18 kHz/K was found [31], and for different fiber crystal samples, 1-15 kHz/K [29]. Thus, the influence of TLS is much weaker in the ceramics than in the crystalline fibers.…”

Section: Temperature Dependence Of the Homogeneous Linewidthsmentioning

confidence: 93%

“…This is highlighted by the studies of different crystal growth techniques that showed that the homogeneous linewidth can vary from 2.4-42 kHz in some crystalline fibers [28,29]. In addition to single-crystal studies, Eu 3+ :Y 2 O 3 has also been the subject of several studies examining the dephasing processes in nanoparticles [30,31]. Therefore, there exists a base of knowledge to draw upon for this material as well as a largely unexplained variation in achievable homogeneous linewidths.…”

Section: Introductionmentioning

confidence: 99%

Dephasing mechanisms of optical transitions in rare-earth-doped transparent ceramics

et al. 2016

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We identify and analyze dephasing mechanisms that broaden the optical transitions of rare-earth ions in randomly oriented transparent ceramics. The study examines the narrow 7 F0 ↔ 5 D0 transition of Eu 3+ dopants in a series of Y 2 O 3 ceramic samples prepared under varying conditions. We characterize the temperature and magnetic field dependence of the homogeneous linewidth, as well as long-term spectral diffusion on time scales up to 1 s. The results highlight significant differences between samples with differing thermal treatments and Zr 4+ additive concentrations. In particular, several distinct magnetic interactions from defect centers are observed, which are clearly distinguished from the broadening due to interactions with two-level systems and phonons. By minimizing the broadening due to the different defect centers, linewidths of the order of 4 kHz are achieved for all samples. The linewidths are limited by temperature-dependent interactions and by an interaction that is yet to be identified. Although the homogeneous linewidth can be narrowed further in these ceramic samples, the broadening is now comparable to the linewidths achieved in rare-earth-ion-doped single crystals. Thus, this work emphasizes the usefulness of studying ceramics to gain insights into dephasing mechanisms relevant to single crystals and suggests that ceramics may be an interesting alternative for applications in classical and quantum information processing.

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“…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%

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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Narrow Optical Homogeneous Linewidths in Rare Earth Doped Nanocrystals

Cited by 51 publications

References 39 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

Dephasing mechanisms of optical transitions in rare-earth-doped transparent ceramics

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

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