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

We characterize the optical coherence and energy-level properties of the 795-nm 3H6 to 3H4 transition of Tm3+ in a Ti4+:LiNbO3 waveguide at temperatures as low as 0.65 K. Coherence properties are measured with varied temperature, magnetic field, optical excitation power and wavelength, and measureme...

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Bibliographic Details
Published in:Physical review. B 2021-04, Vol.103 (13)
Main Authors: Sinclair, Neil, Oblak, Daniel, Saglamyurek, Erhan, Cone, Rufus L, Thiel, Charles W, Tittel, Wolfgang
Format: Article
Language:English
Subjects:
ATOMIC AND MOLECULAR PHYSICS
Coherence
Doping
Dynamic structural analysis
Excitation
Hyperfine structure
Integrated optics
Laser spectroscopy
Lithium niobates
Magnetic fields
Magnetic properties
Metal ions
Nuclear spin
Optical communication
Optical properties
Optical transient phenomena
Quantum information with solid state qubits
Rare earth elements
Rare-earth doped crystals
Signal processing
Spin dynamics
Waveguides
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Summary:We characterize the optical coherence and energy-level properties of the 795-nm 3H6 to 3H4 transition of Tm3+ in a Ti4+:LiNbO3 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 Ti4+- and Tm3+ -doping concentrations, we find that the properties of Tm3+: Ti4+: LiNbO3 produced by indiffusion doping are consistent with those of a bulk-doped Tm3+: LiNbO3 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.
ISSN:2469-9950
2469-9969
DOI:10.1103/PhysRevB.103.134105