Effects of disorder on optical and electron spin linewidths in Er 3+ ,Sc 3+ :Y 2 SiO 5

Welinski, Sacha; Thiel, Charles W.; Dajczgewand, Julian; Ferrier, Alban; Cone, R. L.; Macfarlane, R. M.; Chanelière, Thierry; Louchet-Chauvet, Anne; Goldner, Philippe

doi:10.1016/j.optmat.2016.09.039

Cited by 26 publications

(33 citation statements)

References 27 publications

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“…We extract linewidths of the m I = 1/2, 171 Yb resonance for site I and site II of 3.4 mT and 0.1 mT respectively, which can be compared to their respective g eff of 0.7 and 6. These linewidths are consistent with previ- Table I. ous CW ESR measurements 19 and attributed to a sitedependent g-strain (∆g/g ∼ 0.1-0.3%) similar to that observed in Er 3+ :YSO with the same ion concentration 30 . We next turn to the nuclear spin transitions, studied for the 173 Yb isotope in site I using the Davies ENDOR technique 31,32 with a Tidy pulse 33,34 , RF π-pulse duration of 1.5 µs and the magnetic field aligned approximately with b (see Figure 1(d)).…”

Section: Electron and Nuclear Spin Spectroscopysupporting

confidence: 87%

Coherent spin dynamics of ytterbium ions in yttrium orthosilicate

et al. 2018

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We investigate the electron and nuclear spin coherence properties of ytterbium (Yb 3+ ) ions with non-zero nuclear spin, within an yttrium orthosilicate (Y2SiO5) crystal, with a view to their potential application in quantum memories or repeaters. We find electron spin-lattice relaxation times are maximised at low magnetic field (< 100 mT) where g ∼ 6, reaching 5 s at 2.5 K, while coherence times are maximised when addressing ESR transitions at higher fields where g ∼ 0.7 where a Hahn echo measurement yields T2 up to 73 µs. Dynamical decoupling (XY16) can be used to suppress spectral diffusion and extend the coherence lifetime to over 0.5 ms, close to the limit of instantaneous diffusion. Using Davies electron-nuclear-double-resonance (ENDOR), we performed coherent control of the 173 Yb 3+ nuclear spin and studied its relaxation dynamics. At around 4.5 K we measure a nuclear spin T1 and T2 of 4 and 0.35 ms, respectively, about 4 and 14 times longer than the corresponding times for the electron spin. arXiv:1712.00435v1 [quant-ph] 1 Dec 2017

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Section: Electron and Nuclear Spin Spectroscopysupporting

confidence: 87%

Coherent spin dynamics of ytterbium ions in yttrium orthosilicate

et al. 2018

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“…This gives the red solid curves bounding the confidence interval in Figures 4 and 5 (light red area). Without going much deeper into the analysis, it should be nevertheless noted than we observe at 0.3 mT approximately the same spin linewidths (∼ 5 MHz) than the ones measured via EPR at 60 mT [41]. Assuming a linear broadening with magnetic field, this difference corresponds to a factor of 15 in the broadening coefficients.…”

Section: Discussionsupporting

confidence: 68%

“…The exact modeling of the spin broadening mechanism is beyond the scope of this paper but it should be noted that Γ spin inh exhibits a specific dependency when the magnetic field is rotated. This latter can be evaluated quantitatively from the g-tensor [41] and would induce an extra angular dependency of the FF rate. In other words, both terms in Eq.…”

Section: Discussionmentioning

confidence: 99%

Optical study of the anisotropic erbium spin flip-flop dynamics

et al. 2019

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We investigate the erbium flip-flop dynamics as a limiting factor of the electron spin lifetime and more generally as an indirect source of decoherence in rare-earth doped insulators. Despite the random isotropic arrangement of dopants in the host crystal, the dipolar interaction strongly depends on the magnetic field orientation following the strong anisotropy of the g-factor. In Er 3+ :Y2SiO5, we observe by transient optical spectroscopy a three orders of magnitude variation of the erbium flipflop rate (10ppm dopant concentration). The measurements in two different samples, with 10ppm and 50ppm concentrations, are well-supported by our analytic modeling of the dipolar coupling between identical spins with an anisotropic g-tensor. The model can be applied to other rare-earth doped materials. We extrapolate the calculation to Er 3+ :CaWO4, Er 3+ :LiNbO3 and Nd 3+ :Y2SiO5 at different concentrations.

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“…An increase in the spin linewidth due to co-doping was observed in Er 3+ :Y 2 SiO 5 [55], by co-doping with Sc 3+ . However, codoping also results in an increase in the optical inhomogeneous 205119-7 broadening [55,56]. It is an open question, then, whether it is possible to reduce the spin flip-flop rate significantly by co-doping, without causing a large decrease in the optical depth due to a simultaneous increase in the optical linewidth.…”

Section: A Magnetic Field Dependencementioning

confidence: 90%

“…[53]. Recently, Welinski et al [55] took steps in this direction by measuring the angular dependence of the spin linewidth in erbium-doped Y 2 SiO 5 . We also note that different Kramers ions could display different field dependence of the spectral hole lifetime, in the low-field limit, if the field-independent part of the spin linewidth 0 is larger than κB.…”

Section: A Magnetic Field Dependencementioning

confidence: 99%

Spectral hole lifetimes and spin population relaxation dynamics in neodymium-doped yttrium orthosilicate

et al. 2017

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We present a detailed study of the lifetime of optical spectral holes due to population storage in Zeeman sublevels of Nd 3+ :Y 2 SiO 5 . The lifetime is measured as a function of magnetic field strength and orientation, temperature, and Nd 3+ doping concentration. At the lowest temperature of 3 K we find a general trend where the lifetime is short at low field strengths, then increases to a maximum lifetime at a few hundred mT, and then finally decays rapidly for high field strengths. This behavior can be modeled with a relaxation rate dominated by Nd 3+ -Nd 3+ cross relaxation at low fields and spin lattice relaxation at high magnetic fields. The maximum lifetime depends strongly on both the field strength and orientation, due to the competition between these processes and their different angular dependencies. The cross relaxation limits the maximum lifetime for concentrations as low as 30 ppm of Nd 3+ ions. By decreasing the concentration to less than 1 ppm we could completely eliminate the cross relaxation, reaching a lifetime of 3.8 s at 3 K. At higher temperatures the spectral hole lifetime is limited by the magnetic-field-independent Raman and Orbach processes. In addition we show that the cross relaxation rate can be strongly reduced by creating spectrally large holes of the order of the optical inhomogeneous broadening. Our results are important for the development and design of new rare-earth-ion doped crystals for quantum information processing and narrow-band spectral filtering for biological tissue imaging.

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Effects of disorder on optical and electron spin linewidths in Er 3+ ,Sc 3+ :Y 2 SiO 5

Cited by 26 publications

References 27 publications

Coherent spin dynamics of ytterbium ions in yttrium orthosilicate

Coherent spin dynamics of ytterbium ions in yttrium orthosilicate

Optical study of the anisotropic erbium spin flip-flop dynamics

Spectral hole lifetimes and spin population relaxation dynamics in neodymium-doped yttrium orthosilicate

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