Rare-Earth Monopnictide Alloys for Tunable, Epitaxial, Designer Plasmonics

E. M. Krivoy, A. P. Vasudev, S. Rahimi, R. A. Synowicki, K. M. McNicholas, D. J. Ironside, R. Salas, G. Kelp, D. Jung, H. P. Nair, G. Shvets, D. Akinwande, M. L. Lee, M. L. Brongersma, S. R. Bank

Research output: Contribution to journalArticlepeer-review


We demonstrate that plasmonic response can be tuned spectrally via the alloy composition of an epitaxial semimetallic film. Specifically, attenuated total reflectance studies show that the surface plasmon resonance of rare-earth monopnictide LaxLu1-xAs alloy films can be tuned across the mid-IR, while lattice-matching to technologically important substrates. The electrical properties are a strong function of the composition, which, in turn, manifests as tunability of the optical properties. The ability to produce tunable (semi)metals that can be epitaxially integrated with III-V emitters and absorbers is expected to enable a new generation of novel nanophotonic device architectures and functionality.

Original languageEnglish (US)
Pages (from-to)3051-3056
Number of pages6
JournalACS Photonics
Issue number8
StatePublished - Aug 15 2018


  • epitaxial metal
  • mid-infrared optoelectronics
  • molecular beam epitaxy
  • plasmonics
  • rare-earth monopnictide
  • semimetal
  • tunable metal

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Biotechnology
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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