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Ultra-narrow optical linewidths in rare-earth molecular crystals

Serrano, Diana ; Kuppusamy, Senthil Kumar 1,2; Heinrich, Benoît; Fuhr, Olaf 1,3; Hunger, David ORCID iD icon 2,4; Ruben, Mario 1,2; Goldner, Philippe
1 Institut für Nanotechnologie (INT), Karlsruher Institut für Technologie (KIT)
2 Institut für Quantenmaterialien und -technologien (IQMT), Karlsruher Institut für Technologie (KIT)
3 Karlsruhe Nano Micro Facility (KNMF), Karlsruher Institut für Technologie (KIT)
4 Physikalisches Institut (PHI), Karlsruher Institut für Technologie (KIT)

Abstract (englisch):

Rare-earth ions (REIs) are promising solid-state systems for building light–matter interfaces at the quantum level1,2. This relies on their potential to show narrow optical and spin homogeneous linewidths, or, equivalently, long-lived quantum states. This enables the use of REIs for photonic quantum technologies such as memories for light, optical microwave transduction and computing3–5. However, so far, few crystalline materials have shown an environment quiet enough to fully exploit REI properties. This hinders further progress, in particular towards REI-containing integrated nanophotonics devices6,7. Molecular systems can provide such capability but generally lack spin states. If, however, molecular systems do have spin states, they show broad optical lines that severely limit optical-to-spin coherent interfacing8–10. Here we report on europium molecular crystals that exhibit linewidths in the tens of kilohertz range, orders of magnitude narrower than those of other molecular systems. We harness this property to demonstrate efficient optical spin initialization, coherent storage of light using an atomic frequency comb, and optical control of ion–ion interactions towards implementation of quantum gates. ... mehr

DOI: 10.1038/s41586-021-04316-2
Zitationen: 35
Zitationen: 37
Zugehörige Institution(en) am KIT Institut für Nanotechnologie (INT)
Institut für Quantenmaterialien und -technologien (IQMT)
Karlsruhe Nano Micro Facility (KNMF)
Physikalisches Institut (PHI)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 10.03.2022
Sprache Englisch
Identifikator ISSN: 0028-0836, 1476-4687
KITopen-ID: 1000143715
HGF-Programm 47.11.02 (POF IV, LK 01) Emergent Quantum Phenomena
Erschienen in Nature
Verlag Nature Research
Band 603
Heft 7900
Seiten 241–246
Vorab online veröffentlicht am 09.03.2022
Nachgewiesen in Dimensions
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