Optical response from terahertz to visible light of electronuclear transitions in LiYF4 : Ho3+

Matmon, G.; Lynch, S. A.; Rosenbaum, T. F.; Fisher, A. J.; Aeppli, G.

doi:10.1103/physrevb.94.205132

Optical response from terahertz to visible light of electronuclear transitions in LiYF₄ : Ho3⁺

Journal Article · Mon Nov 21 00:00:00 EST 2016 · Physical Review B

DOI:https://doi.org/10.1103/physrevb.94.205132· OSTI ID:1535799

Matmon, G. ^[1]; Lynch, S. A. ^[2]; Rosenbaum, T. F. ^[3]; Fisher, A. J. ^[4]; Aeppli, G. ^[5]

Univ. College London (United Kingdom); DOE/OSTI
Cardiff Univ. (United Kingdom)
California Institute of Technology (CalTech), Pasadena, CA (United States)
Univ. College London (United Kingdom)
Eidgenoessische Technische Hochschule (ETH), Zurich (Switzerland)

Because of its role as a model system with tunable quantum fluctuations and quenched disorder, and the desire for optical control and readout of its states, we have used high-resolution optical absorption spectroscopy to measure the crystal-field excitations for Ho³⁺ ions in LiHo_x Y_1-xF₄ from the terahertz to visible regimes. We show that many of the excitations yield very narrow lines visibly split even by the nuclear hyperfine interaction, making Ho³⁺ in LiHo_x Y_1-xF₄ a candidate host for optically addressable electronuclear qubits with quality factors as high as Q = 4.7 × 10⁵, where the higher-lying levels are electronic singlets. Optical transitions in the easily accessible near- and mid-infrared are narrow enough to allow readout of the ground-state electronuclear qubits responsible for the interesting magnetism of LiHo_x Y_1-xF₄. While many of the higher-lying states have been observed previously, we also report here detailed spectra of terahertz excitations. The strengths of the electric and magnetic dipole crystal-field transition lines of five of the lowest excited spin-orbit manifolds of dilute LiYF₄ : Ho³⁺ were calculated and compared with measurement. Finally, the magnitude of the nuclear hyperfine coupling was used to assign the correct upper and lower states to transition lines.

View Accepted Manuscript (DOE)

Research Organization:: California Inst. of Technology (CalTech), Pasadena, CA (United States)

Sponsoring Organization:: UCL Engineering and Physical Sciences Research Council; USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: SC0014866

OSTI ID:: 1535799

Alternate ID(s):: OSTI ID: 1333036

Journal Information:: Physical Review B, Journal Name: Physical Review B Journal Issue: 20 Vol. 94; ISSN 2469-9950

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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Optical response from terahertz to visible light of electronuclear transitions in LiYF₄ : Ho3⁺