# this file is part of refractiveindex.info database
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REFERENCES: |
    C.-W. Chen, T.-T. Tang, S.-H. Lin, J. Y. Huang, C.-S. Chang, P.-K. Chung, S.-T. Yen, C.-L. Pan.
    Optical properties and potential applications of ɛ-GaSe at terahertz frequencies.
    <a href="https://doi.org/10.1364/JOSAB.26.000A58"><i>J. Opt. Soc. Am. B</i> <b>26</b>, A58-A65 (2009)</a>
COMMENTS: |
    Extraordinary ray (e)
CONDITIONS:
    direction: e
DATA:
  - type: formula 4
    wavelength_range: 3 1500
    coefficients: 5.76 0.4206 2 1780.3 1 0 0 0 0 0.3879 -2 -0.2288 -4 0.1223 -6