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1 results

  • Probing hyperbolic polaritons using infrared attenuated total reflectance micro-spectroscopy

  • Thomas G. Folland, Tobias W. W. Maß, Joseph R. Matson, J. Ryan Nolen, Song Liu, Kenji Watanabe, Takashi Taniguchi, James H. Edgar, Thomas Taubner, Joshua D. Caldwell
  • Journal:
    MRS Communications / Volume 8 / Issue 4 / December 2018
    Published online by Cambridge University Press:
    01 October 2018, pp. 1418-1425
    Print publication:
    December 2018
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  • Hyperbolic polariton modes are highly appealing for a broad range of applications in nanophotonics, including surfaced enhanced sensing, sub-diffractional imaging, and reconfigurable metasurfaces. Here we show that attenuated total reflectance (ATR) micro-spectroscopy using standard spectroscopic tools can launch hyperbolic polaritons in a Kretschmann–Raether configuration. We measure multiple hyperbolic and dielectric modes within the naturally hyperbolic material hexagonal boron nitride as a function of different isotopic enrichments and flake thickness. This overcomes the technical challenges of measurement approaches based on nanostructuring, or scattering scanning near-field optical microscopy. Ultimately, our ATR approach allows us to compare the optical properties of small-scale materials prepared by different techniques systematically.