journal article·2021-04-12Open access

Optical coherence and energy-level properties of a Tm3+ -doped LiNbO3 waveguide at subkelvin temperatures

Neil Sinclair, Daniel Oblak, Erhan Saglamyurek, Rufus L. Cone, Charles W. Thiel, Wolfgang Tittel

Physical Review B· Volume 103· Issue 13

Abstract

We characterize the optical coherence and energy-level properties of the 795-nm $3\mathrm{H}6$ to $3\mathrm{H}4$ transition of ${\mathrm{Tm}}3+$ in a ${\mathrm{Ti}}4+$:$\mathrm{Li}\mathrm{Nb}{\mathrm{O}}3$ waveguide at temperatures as low as 0.65 K. Coherence properties are measured with varied temperature, magnetic field, optical excitation power and wavelength, and measurement timescale. We also investigate nuclear spin-induced hyperfine structure and population dynamics with varying magnetic field and laser excitation power. Except for accountable differences due to different ${\mathrm{Ti}}4+$- and ${\mathrm{Tm}}3+$-doping concentrations, we find that the properties of ${\mathrm{Tm}}3+$:${\mathrm{Ti}}4+$:$\mathrm{Li}\mathrm{Nb}{\mathrm{O}}3$ produced by indiffusion doping are consistent with those of a bulk-doped ${\mathrm{Tm}}3+$:$\mathrm{Li}\mathrm{Nb}{\mathrm{O}}3$ crystal measured under similar conditions. Our results, which complement previous work in a narrower parameter space, support using rare-earth ions for integrated optical and quantum signal processing.
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Research context

OpenAlex topics: Quantum optics and atomic interactions · Photorefractive and Nonlinear Optics · Atomic and Subatomic Physics Research

SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.

Affiliations

Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada; John A. Paulson School of Engineering and Applied Sciences, Harvard University, Cambridge, Massachusetts 02138, USA; and Division of Physics, Mathematics and Astronomy, and Alliance for Quantum Technologies (AQT), California Institute of Technology, Pasadena, California 91125, USA

Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada

Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4 Canada and Department of Physics, University of Alberta, Edmonton, Alberta, T6G 2E1 Canada

Department of Physics, Montana State University, Bozeman, Montana 59717, USA

Institute for Quantum Science and Technology, and Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada and QuTech and Kavli Institute of Nanoscience, Delft University of Technology, 2600 GA Delft, The Netherlands

Funding

Natural Sciences and Engineering Research Council of Canada · Alberta Innovates - Technology Futures · Defense Advanced Research Projects Agency · National Science Foundation · U.S. Department of Energy · Nederlandse Organisatie voor Wetenschappelijk Onderzoek

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