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    Optical thin-film materials with low refractive index for broadband elimination of Fresnel reflection

    In 1880, by studying light passing through Earth's atmosphere, Lord Rayleigh mathematically demonstrated that graded-refractive-index layers have broadband antireflection characteristics1. Graded-index coatings w...

    J.-Q. **, Martin F. Schubert, Jong Kyu Kim, E. Fred Schubert in Nature Photonics (2007)