# this file is part of refractiveindex.info database
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REFERENCES: |
    Y. Rah, Y. Jin, S. Kim, K. Yu.
    Optical analysis of the refractive index and birefringence of hexagonal boron nitride from the visible to near-infrared.
    <a href="https://doi.org/10.1364/OL.44.003797"><i>Opt. Lett.</i>, <b>44</b>, 3797-3800 (2019)</a>    
COMMENTS: |
    Hexagonal boron nitride (hBN). Mechanically exfoliated, few-hundred-nm-thick h-BN flakes on a Si substrate. Extraordinary ray (e).
CONDITIONS:
    direction: e
DATA:
  - type: formula 2
    wavelength_range: 0.4 1.6
    coefficients: 0 2.2631 0.026981