Probing strong coupling between a microwave cavity and a spin ensemble with Raman heterodyne spectroscopy

King, Gavin G. G.; Barnett, Peter S.; Bartholomew, John G.; Faraon, Andrei; Longdell, Jevon J.

doi:10.1103/physrevb.103.214305

Cited by 7 publications

(1 citation statement)

References 45 publications

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“…This is due to the possibility for fast manipulation and their high degree of tunability 1 , yet achieving long coherence times with electronic spins remains challenging due to their magnetic sensitivity. Efficient and coherent spin-MW interfaces have been developped for various solid-state electronic spin systems, such as nitrogen-vacancy centers in diamond [2][3][4][5][6] , rare-earth ion doped crystals [7][8][9][10][11] , phosphorus donors in silicon 12,13 and ferri-and ferromagnetic magnons [14][15][16][17] . Furthermore, electronic spin systems that simultaneously couple coherently to light allow reversible coupling between optical and MW modes, which is a key feature of optical quantum memories [18][19][20][21][22] and MW-optical quantum transducers [23][24][25][26][27] .…”

Section: Introductionmentioning

confidence: 99%

Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in 171Yb3+:Y2SiO5

et al. 2023

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The coherent interaction of solid-state spins with both optical and microwave fields provides a platform for a range of quantum technologies, such as quantum sensing, microwave-to-optical quantum transduction and optical quantum memories. Rare-earth ions with electronic spins are interesting in this context. In this work, we use a loop-gap microwave resonator to coherently drive optical and microwave clock transitions simultaneously in a 171Yb3+:Y2SiO5 crystal, achieving a Rabi frequency of 0.56 MHz at 2.497 GHz over a 1-cm long crystal. Furthermore, we provide insights into the spin dephasing at very low fields, showing that superhyperfine-induced collapse of the Hahn echo plays an important role. Our calculations and measurements reveal that the effective magnetic moment can be manipulated in 171Yb3+:Y2SiO5, which suppresses the superhyperfine interaction at the clock transition. At a doping concentration of 2 ppm and 3.4 K, we achieve spin coherence time of 10.0 ± 0.4 ms.

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Section: Introductionmentioning

confidence: 99%

Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in 171Yb3+:Y2SiO5

et al. 2023

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Many-body cavity quantum electrodynamics with driven inhomogeneous emitters

Lei

Fukumori

Rochman

et al. 2023

Nature

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Er-doped anatase TiO2 thin films on LaAlO3 (001) for quantum interconnects (QuICs)

Shin

Gray

Marcaud

et al. 2022

Applied Physics Letters

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Rare-earth ions (REIs) doped into solid-state crystal hosts offer an attractive platform for realizing quantum interconnects that can function as quantum memories and quantum repeaters. The 4f valence electrons of REIs are shielded by 5s and 5p electrons and undergo highly coherent transitions even when embedded in host crystals. In particular, Er3+ has an optical transition in the telecom band that is suitable for low-loss communication. Recently, REIs in thin film systems have gained interest due to potential advantages in providing a flexible host crystal environment, enabling scalable on-chip integration with other quantum devices. Here, we investigate the structural and optical properties of Er-doped anatase TiO2 thin films on LaAlO3 (001) substrates. By choosing a system with minimal lattice mismatch and adjusting Er-dopant concentration, we achieve optical inhomogeneous linewidths of 5 GHz at 4.5 K. We show that 9 nm-thick buffer and capping layers can reduce the linewidth by more than 40%, suggesting a pathway to further narrowing linewidths in this system. We also identify that Er3+ ions mainly incorporate into substitutional Ti4+ sites with non-polar D2d symmetry, which makes Er dopants insensitive to the first order to local electric fields from impurities and is desirable for coherence properties of Er3+ spins.

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Probing strong coupling between a microwave cavity and a spin ensemble with Raman heterodyne spectroscopy

Cited by 7 publications

References 45 publications

Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in 171Yb3+:Y2SiO5

Coherent optical-microwave interface for manipulation of low-field electronic clock transitions in 171Yb3+:Y2SiO5

Many-body cavity quantum electrodynamics with driven inhomogeneous emitters

Er-doped anatase TiO2 thin films on LaAlO3 (001) for quantum interconnects (QuICs)

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