Effects of magnetic field orientation on optical decoherence in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mtext>Er</mml:mtext></mml:mrow><mml:mrow><mml:mn>3</mml:mn><mml:mo>+</mml:mo></mml:mrow></mml:msup><mml:mo>:</mml:mo><mml:msub><mml:mtext>Y</mml:mtext><mml:mn>2</mml:mn></mml:msub><mml:msub><mml:mrow><mml:mtext>SiO</mml:mtext></mml:mrow><mml:mn>5</mml:mn></mml:msub></mml:mrow></mml:math>

Böttger, Thomas; Thiel, Charles W.; Cone, R. L.; Sun, Yazhou

doi:10.1103/physrevb.79.115104

Cited by 169 publications

(151 citation statements)

References 21 publications

(41 reference statements)

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“…Nevertheless the coherence time necessary to preserve the quantumness falls in the microsecond range even at subKelvin temperature [3]. Instead of amorphous materials [4], crystalline samples namely Er 3+ :Y 2 SiO 5 have shown remarkably long optical coherence time for solids [5]. These engaging properties are unfortunately counterbalanced by poor optical pumping dynamics.…”

mentioning

confidence: 99%

Large efficiency at telecom wavelength for optical quantum memories

Dajczgewand¹,

Gouët²,

Louchet-Chauvet³

et al. 2014

Opt. Lett.

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We implement the ROSE protocol in an erbium doped solid, compatible with the telecom range. The ROSE scheme is an adaptation of the standard 2-pulse photon echo to make it suitable for a quantum memory. We observe an efficiency of 40% in a forward direction by using specific orientations of the light polarizations, magnetic field and crystal axes. The use of erbium doped materials has revolutionized fiber-optic communications. The erbium-doped fiber amplifier is a key enabling technology already emblematic of our century. Its transposition to the quantum communication world is an active subject of research showing interesting possibilities for long distance quantum cryptography [1,2].The direct use of erbium-doped fiber as an optical quantum memory is extremely appealing. Nevertheless the coherence time necessary to preserve the quantumness falls in the microsecond range even at subKelvin temperature [3]. Instead of amorphous materials [4], crystalline samples namely Er 3+ :Y 2 SiO 5 have shown remarkably long optical coherence time for solids [5]. These engaging properties are unfortunately counterbalanced by poor optical pumping dynamics. Spectral hole-burning (SHB) required by most of the quantum storage protocols is particularly challenging in erbium doped solids [6]. This intrinsic limitation is both due to the short lifetime of the population possibly shelved in the Zeeman sublevels (< 100 ms [6]) and to the long excited state population lifetime (∼ 10 ms). The ratio between the two timescales is not sufficient to obtain a good state preparation for optical thick samples. This simple experimental observation drastically bridles the implementation of quantum memories [7]. As an example, using the protocol named CRIB for controlled reversible inhomogeneous broadening derived from the photon- We recently proposed a protocol called Revival Of Si-

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mentioning

confidence: 99%

Large efficiency at telecom wavelength for optical quantum memories

Dajczgewand¹,

Gouët²,

Louchet-Chauvet³

et al. 2014

Opt. Lett.

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“…In general, the effective homogeneous linewidth can strongly depend on the orientation of the applied magnetic field B as well as the specific ion sites addressed in the crystal by the resonant optical excitation [60]. For amorphous media, there can be a wide range of local environments and a corresponding need to average over a complex distribution of sites and orientations [63].…”

Section: Echo Decays In Powders Of Randomly Orientated Crystallitesmentioning

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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“…Rare earth sesquioxides, R 2 O 3 (R is rare earth), are alternative attractive candidates to exploit the coherent quantum phenomena because the intra-4 f transitions in rare-earth ions are weakly perturbed by the crystalline environments, and they exhibit a resonance with a very narrow inhomogeneous linewidth [12][13][14][15]. In the various R 2 O 3 , we focus on the single crystalline (Er x Sc 1−x ) 2 O 3 including Er 2 O 3 since the trivalent Er (Er 3+ ) can interact with a telecommunication-band photon (∼1.5 µm) and is a potential platform for the coherent population manipulation in the quantum information network using the well-developed infrastructure [15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

et al. 2018

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Abstract:We have investigated the energy transfers in the 1.54-µm region of (Er,Sc) 2 O 3 epitaxial thin films grown on Si(111). The interplay of the energy transfers between Er ions in the different and the same symmetry sites makes the dynamics complicated. To suppress the energy transfer upconversion, low power and resonant excitation of the third crystal-field level ( 4 I 13/2 : Y 3 ) of the Er 3+ site with C 3i symmetry was employed. The time-resolved photoluminescence measurements of the Y 1 -Z 1 transition indicate the existence of two decay components having fast (10-100 µs) and slow (0.1-1 ms) relaxation times in the range of 4-60 K. The model calculation including the inter-site energy transfers, the temperature-sensitive and -insensitive non-radiative relaxations fits the experimental results well. Moreover, the long averaged inter-Er 3+ distance obtained by decreasing Er concentration was found to reduce two kinds of non-radiative relaxation rates and the energy transfer rates between Er ions very effectively.

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Effects of magnetic field orientation on optical decoherence inEr3+:Y2SiO5

Cited by 169 publications

References 21 publications

Large efficiency at telecom wavelength for optical quantum memories

Large efficiency at telecom wavelength for optical quantum memories

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

Investigation of Population Dynamics in 1.54-μm Telecom Transitions of Epitaxial (ErxSc1-x)2O3 Thin Layers for Coherent Population Manipulation: Weak Excitation Regime

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