Microcavity-Modified Emission from Rare-Earth Ion-Based Molecular Complexes

Ruggero Emmanuele, Michal MacIejczyk, Ashton Smith, Xinyue Cheng, Eric Masson, David J. Gosztola, Saw Wai Hla, Neil Robertson, Xuedan Ma*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract / Description of output

Despite the remarkable optical properties of rare-earth ion materials, their applications as light sources and in quantum technologies are often hindered by their long lifetimes and weak emission. Leveraging the natural compatibility of rare-earth ion molecular complexes with photonic structures, here we modify their photoluminescence properties by coupling them to a flexible open Fabry-Pérot cavity. The full in situ tunability of the Fabry-Pérot cavity allows fine control over its cavity modes and the achievement of resonant coupling between the rare-earth ion emission and the cavity modes. This configuration allows us to achieve a maximum photoluminescence enhancement factor of 30 and accelerate the decay rate up to two orders of magnitude. Our pump-power-dependent spectroscopic studies of the emitter-cavity system suggest that the cavity-modified emission is primarily caused by amplified spontaneous emission. These results suggest that integrating rare-earth ion molecular complexes with photonic structures could be a viable approach for the effective tuning of their optical properties. This natural compatibility, together with their versatile molecular structures and the resultant electronic states, renders rare-earth ion molecular complexes a potential alternative material platform for lighting and quantum applications.

Original languageEnglish
Pages (from-to)2315-2321
JournalACS Photonics
Issue number7
Early online date26 Apr 2022
Publication statusE-pub ahead of print - 26 Apr 2022

Keywords / Materials (for Non-textual outputs)

  • amplified spontaneous emission
  • Eu(III) complexes
  • Fourier imaging
  • open Fabry-Pérot cavity
  • rare-earth ions


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