High-resolution spectroscopic techniques for studying rare-earth ions in nanoparticles

Summary, in English

Rare-earth doped nanoparticles can exhibit narrow optical and spin linewidths at low temperatures. These outstanding properties for nanomaterials make them attractive for quantum technologies based on optically addressable spins such as quantum memories and computers. Although accurate linewidth measurements have been reported using, for example, spectral hole burning or photon echo techniques, so far they have been mostly restricted to large ensembles of particles. Being able to extend linewidths measurements to few and single particles is particularly important in view of their integration in nanophotonic devices. In this paper, we present techniques for determining inhomogeneous and homogeneous linewidths of small ensembles of rare-earth ions in doped nanoparticles with high signal-to-noise ratios for convenient integration times. Using these techniques we have observed property variations for particles from the same synthesis, a first step towards their optimization for applications in quantum technologies.

• Author: John G. Bartholomew; Karmel de Oliveira Lima; Alban Ferrier; Adam Kinos; Jenny Karlsson; Lars Rippe; Andreas Walther; Ivan Scheblykin; Stefan Kröll; Philippe Goldner
• Department/s: LU Profile Area: Light and Materials; LTH Profile Area: Photon Science and Technology; LTH Profile Area: Nanoscience and Semiconductor Technology; Atomic Physics; NanoLund: Centre for Nanoscience; LTH Profile Area: Engineering Health; Chemical Physics
• Publishing year: 2023-05
• Language: English
• Publication/Series: Journal of Luminescence
• Volume: 257
• Links: http://dx.doi.org/10.1016/j.jlumin.2023.119743
• Document type: Journal article
• Publisher: Elsevier
• Topic: Atom and Molecular Physics and Optics; Condensed Matter Physics (including Material Physics, Nano Physics)
• Keywords: Linewidth; Nanoparticle; Quantum technologies; Rare earth
• Status: Published
• ISBN/ISSN/Other: ISSN: 0022-2313