High-resolution magneto-optical spectroscopy of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"><mml:mmultiscripts><mml:mi>LiYF</mml:mi><mml:mn>4</mml:mn><mml:none /><mml:mprescripts /><mml:none /><mml:mn>7</mml:mn></mml:mmultiscripts><mml:mo>:</mml:mo><mml:mmultiscripts><mml:mi>Er</mml:mi><mml:none /><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow><mml:mprescripts /><mml:none /><mml:mn>167</mml:mn></mml:mmultiscripts><mml:mo>,</mml:mo><mml:mspace width="0.16em" /><mml:mmultiscripts><mml:m

Gerasimov, K. I.; Minnegaliev, M. M.; Малкин, Б. З.; Baibekov, E. I.; Моисеев, С. А.

doi:10.1103/physrevb.94.054429

Cited by 26 publications

(18 citation statements)

References 41 publications

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“…Isotopically purified RE-doped LYF crystals are well known for their ultra-narrow optical inhomogeneous broadening ∼10 MHz limited by superhyperfine interactions between electronic spins of impurity ions and nuclei spins of the host crystal [13,14]. Today, Er:LYF crystals are again in the focus of the increasing research interest [15][16][17], which is driven by their possible applications in broadband quantum memory based on offresonant Raman protocols [18][19][20][21][22]. The basic idea of such technique is to map the quantum state of incoming optical photon into a long-lived hyperfine spin state, such as coherent spin excitation on a zero first order Zeeman (ZEFOZ) transition, which is insensitive to the magnetic field fluctuations [23,24].…”

Section: Introductionmentioning

confidence: 99%

Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

et al. 2018

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We explore optical coherence and spin dynamics of an isotopically purified 166 Er: 7 LiYF 4 crystal below 1 K and at weak magnetic fields < 0.3T. Crystals were grown in our lab and demonstrate narrow inhomogeneous optical broadening down to 16MHz. Solid-state atomic ensembles with such narrow linewidths are very attractive for implementing of off-resonant Raman quantum memory and for the interfacing of superconducting quantum circuits and telecom C-band optical photons. Both applications require a low magnetic field of ∼10mT. However, at conventional experimental temperatures T>1.5K, optical coherence of Er:LYF crystal attains m 10 s time scale only at strong magnetic fields above 1.5 T. In the present work, we demonstrate that the deep freezing of Er:LYF crystal below 1 K results in the increase of optical coherence time to m 100 s at weak fields.

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Section: Introductionmentioning

confidence: 99%

Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

et al. 2018

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“…1b). At the same time for the crystal studied in [1] with 90 MHz inhomogeneous linewidths we could not see the echo. The photon echo experiments were conducted on the single absorption line that is located around the zero frequency on fig.…”

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confidence: 83%

Stationary and coherent spectroscopy of ¹⁶⁷Er³⁺ in waveguides in ⁷LiYF₄ crystal

et al. 2017

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Abstract.We have conducted a spectroscopic investigation of 167 Er 3+ ions in optical waveguides on an optical transition between the hyperfine sublevels of 4 I15/2 and 4 I9/2 multiplets. Waveguides with diameters ranging from 20 to 100 μm were produced in the crystal by a femtosecond laser using the depressed-cladding approach. The spectroscopy results of 167 Er 3+ ions inside the waveguides show additional broadening and an overall shifts of the spectra compared to the bulk spectrum of ions. The sign of the observed frequency shift depends on the diameter of the specific waveguide. We have also observed a two-pulse photon echo in several waveguides. The acquired results show the possibility for integrated quantum schemes in rare-earth ions doped crystals.Development of optical quantum technologies including optical processors and quantum repeaters is accompanied by the increased attention to their subsequent realization in optical integral schemes. That means that experimental development of integral quantum memories in such schemes is also necessary. Multi-atomic systems can serve as active media for such experiments, such systems include crystals that often have longer quantum coherence times. So waveguides in crystals doped with rare-earth ions are of great interest especially those combinations of rare-earth ion and crystal matrix that exhibit desirable spectroscopic parameters for quantum memory realization. In our previous work we studied the 167 30, 50, 75 and 100 μm and were produced by a femtosecond laser using the depressedcladding approach with 515 nm wavelength. We carried out a high-resolution spectroscopy of 167 Er 3+ ions in different waveguides at 4 K temperature. Fig. 1a shows three of the resulting

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“…An alternative is to use a full crystal field model for the whole 4f configuration of the rare earth ion, including interactions that generate hyperfine structure. These types of models have been successfully applied for several different hosts doped with Kramers and non-Kramers rare earth ions, including Pr 3+ [5,[7][8][9][10], Er 3+ [11][12][13][14], Ho 3+ [7,[15][16][17][18][19][20][21], Tb 3+ [22,23], and Tm 3+ [4,10]. However, a complete crystal field calculation of Eu 3+ Zeemanhyperfine structure has not been demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Complete crystal field calculation of Zeeman-hyperfine splittings in europium

Smith,

Reid,

Sellars

et al. 2021

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Computational crystal-field models have provided consistent models of both electronic and Zeeman-hyperfine structure for several rare earth ions. These techniques have not yet been applied to the Zeeman-hyperfine structure of Eu 3+ because modeling the structure of the J = 0 singlet levels in Eu 3+ requires inclusion of the commonly omitted lattice electric quadrupole and nuclear Zeeman interactions. Here, we include these terms in a computational model to fit the crystal field levels and the Zeeman-hyperfine structure of the 7 F0 and 5 D0 states in three Eu 3+ sites: the C4v and C3v sites in CaF2 and the C2 site in EuCl3.6H2O. Close fits are obtained for all three sites which are used to resolve ambiguities in previously published parameters, including quantifying the anomalously large crystal-field-induced state mixing in the C3v site and determining the signs of Zeeman-hyperfine parameters in all three sites. We show that this model allows accurate prediction of properties for Eu 3+ important for quantum information applications of these ions, such as relative transition strengths. The model could be used to improve crystal field calculations for other non-Kramers singlet states. We also present a spin Hamiltonian formalism without the normal assumption of no J mixing, suitable for other rare earth ion energy levels where this effect is important.

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High-resolution magneto-optical spectroscopy ofLiYF47:Er3+167,

Cited by 26 publications

References 41 publications

Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

Stationary and coherent spectroscopy of ¹⁶⁷Er³⁺ in waveguides in ⁷LiYF₄ crystal

Complete crystal field calculation of Zeeman-hyperfine splittings in europium

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High-resolution magneto-optical spectroscopy ofLiYF47:Er3+167,

Cited by 26 publications

References 41 publications

Optical coherence of166Er:7LiYF4crystal below 1 K

Optical coherence of166Er:7LiYF4crystal below 1 K

Stationary and coherent spectroscopy of 167Er3+ in waveguides in 7LiYF4 crystal

Complete crystal field calculation of Zeeman-hyperfine splittings in europium

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Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

Optical coherence of¹⁶⁶Er:⁷LiYF₄crystal below 1 K

Stationary and coherent spectroscopy of ¹⁶⁷Er³⁺ in waveguides in ⁷LiYF₄ crystal