Toward liquid cell quantum sensing: Ytterbium complexes with ultranarrow absorption

• 成果类型: Article
• 署名作者: Shin, Ashley J.; Zhao, Changling; Shen, Yi; Dickerson, Claire E.; Li, Barry; Roshandel, Hootan; Bim, Daniel; Atallah, Timothy L.; Oyala, Paul H.; He, Yongjia; Alson, Lianne K.; Kerr, Tyler A.; Alexandrova, Anastassia N.; Diaconescu, Paula L.; Campbell, Wesley C.; Caram, Justin R.
• 署名单位: University of California System; University of California Los Angeles; University of California System; University of California Los Angeles; University System of Ohio; Denison University; California Institute of Technology
• 刊物名称: SCIENCE
• ISSN/ISSBN: 0036-13059
• DOI: 10.1126/science.adf7577
• 发表日期: 2024-08-09
• 页码: 651-656
• 关键词: electronic-structure calculations; ring-opening polymerization; luminescent ytterbium; perturbation-theory; redox control; basis-sets; single; ions; transitions; dichroism

摘要

The energetic disorder induced by fluctuating liquid environments acts in opposition to the precise control required for coherence-based sensing. Overcoming fluctuations requires a protected quantum subspace that only weakly interacts with the local environment. We report a ytterbium complex that exhibited an ultranarrow absorption linewidth in solution at room temperature with a full width at half maximum of 0.625 milli-electron volts. Using spectral hole burning, we measured an even narrower linewidth of 410 pico-electron volts at 77 kelvin. Narrow linewidths allowed low-field magnetic circular dichroism at room temperature, used to sense Earth-scale magnetic fields. These results demonstrated that ligand protection in lanthanide complexes could substantially diminish electronic state fluctuations. We have termed this system an atomlike molecular sensor (ALMS) and proposed approaches to improve its performance.