Strain-mediated ion–ion interaction in rare-earth-doped solids

Louchet-Chauvet, Anne; Chanelière, Thierry

doi:10.1088/1361-648x/acce17

Cited by 4 publications

(2 citation statements)

References 69 publications

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“…• Ion-ion coupling: spectral diffusion due to Tm 3+ -Tm 3+ interaction can play a role in the observed broadening of the linewidth. The low Tm 3+ ion concentration of 1% in this YGG crystal signifies that the average distance between thulium ions is unlikely to cause broadening of the observed magnitude but an excitationinduced interaction between Tm 3+ ions [56] or strain-mediated Tm 3+ -Tm 3+ interaction [57] may cause this to happen. This is similar to the situation observed in Tm:YAG, which has the same site symmetry and also has negligible magnetic or electric dipole-dipole interactions, but still exhibits very strong instantaneous spectral diffusion that is comparable in magnitude to the magnetic interaction strength.…”

Section: Long-term Spectral Diffusion: Magnetic-field-dependent Spect...mentioning

confidence: 85%

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Das,

Falamarzi Askarani,

Davidson

et al. 2024

Mater. Quantum. Technol.

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Rare-earth ion-doped crystals are of great interest for quantum memories, a central component in future quantum repeaters. To assess the promise of 1% Tm3+-doped yttrium gallium garnet (Tm:YGG), we report measurements of optical coherence and energy-level lifetimes of its 3H6 ↔ 3H4 transition at a temperature of around 500 mK and various magnetic fields. Using spectral hole burning, we find hyperfine ground-level (Zeeman level) lifetimes of several minutes at magnetic fields of less than 1000 G. We also measure coherence time exceeding one millisecond using two-pulsephoton echoes. Three-pulse photon echo and spectral hole burning measurements reveal that due to spectral diffusion, the effective coherence time reduces to a few μs over a timescale of around two hundred seconds. Finally, temporal and frequency-multiplexed storage of optical pulses using the atomic frequency comb protocol is demonstrated. Our results suggest Tm:YGG to be promising for multiplexed photonic quantum memory for quantum repeaters.

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Section: Long-term Spectral Diffusion: Magnetic-field-dependent Spect...mentioning

confidence: 85%

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Das,

Falamarzi Askarani,

Davidson

et al. 2024

Mater. Quantum. Technol.

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“…As a result, the ions experience enhanced cross-relaxation or quenching effects. The enhancement of nonradiative decay in high atomic density rare-earth crystals has been observed [23], while instantaneous spectral diffusion and excitation-induced decoherence have been extensively studied in various rare-earth doped systems [24][25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures

Lei,

Kling,

Hosseini

2024

J. Opt.

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We investigate the optical lifetime, decay characteristics, spectral linewidth and energy level properties of thulium ions doped in a KY(WO$_{\text{4}}$)$_{\text{2}}$ crystal at 4K temperature. High doping concentration of thulium ions with inhomogeneous broadening allow us to study nonradiative behaviors, instantaneous spectral diffusion, and spectral power broadening in this solid-state material. The theoretical consideration of ion-ion interactions is shown to accurately characterize the absorption, decay and other spectral behaviors of Tm$^{\text{3+}}$ ions. We observe more than ten-fold reduction in the decay time of $^3$H$_4$ state and about three-fold reduction in the spectral-hole lifetime as we approach the center of the inhomogeneous broadening, corresponding to higher optical densities.

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Spectral Multiplexing of Rare‐Earth Emitters in a Co‐Doped Crystalline Membrane

Ulanowski,

Früh,

Salamon

et al. 2024

Advanced Optical Materials

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The spectral addressing of many individual rare‐earth dopants in optical resonators offers great potential for realizing distributed quantum information processors. To this end, it is required to understand and control the spectral properties of the emitters in micron‐scale devices. Here, erbium emitters are investigated in a Fabry–Perot resonator that contains a 10 µm thin membrane of crystalline yttrium orthosilicate that is co‐doped with europium. The co‐doping allows for tailoring the inhomogeneous distribution of the emitter frequency. With this approach, more than 360 spectrally resolved emitters are observed with Purcell factors exceeding 35, each of which constitutes an individually addressable qubit within the micron‐scale resonator. In addition to this spectral multiplexing, the optical coherence is preserved up to 0.62(3) ms under dynamical decoupling. Without decoupling, the coherence still reaches the lifetime limit for the emitters with the strongest Purcell enhancement that leads up to a 110‐fold lifetime reduction, down to 0.104(9) ms. Future work may combine this with long‐lived nuclear spin memories, which makes the investigated co‐doped membranes a promising platform for quantum repeaters and distributed quantum computers.

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Strain-mediated ion–ion interaction in rare-earth-doped solids

Cited by 4 publications

References 69 publications

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures

Spectral Multiplexing of Rare‐Earth Emitters in a Co‐Doped Crystalline Membrane

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Strain-mediated ion–ion interaction in rare-earth-doped solids

Cited by 4 publications

References 69 publications

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Optical investigations of coherence and relaxation dynamics of a thulium-doped yttrium gallium garnet crystal at sub-kelvin temperatures for optical quantum memory

Optical characterizations of densely doped Tm3+:KYW crystals at low temperatures

Spectral Multiplexing of Rare‐Earth Emitters in a Co‐Doped Crystalline Membrane

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Optical characterizations of densely doped Tm³⁺:KYW crystals at low temperatures