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Phys. Rev. B 32, 5068–5080 (1985)

[Issue 8 – 15 October 1985 ]

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Grazing-incidence antireflection films. I. Basic theory

J. P. Hannon, N. V. Hung, and G. T. Trammell

Physics Department, Rice University, Houston, Texas 77251

E. Gerdau, M. Mueller, R. Rüffer, and H. Winkler

Institut für Experimentalphysik, Universitat Hamburg, Hamburg, Germany

We discuss the possibility of a new interference technique for x-ray and gamma -ray optics—the simple idea of grazing-incidence antireflection films (GIAR films)—for creating high-efficiency antireflection coatings for near-grazing-incidence reflection of hard x rays and gamma rays. The motivation is the possible application to producing ``ultranarrow'' bandpass filters for synchrotron radiation with frequency widths [approx equals] 10^-8–10^-6 eV, giving a unique high-resolution, long-coherence-length, x-ray source for probing soft inelastic excitations and opening up new possibilities in x-ray interferometry. In this first of two papers on nonresonant GIAR films, we develop the basic theory and discuss in detail the simplest ideas for achieving antireflection films—impedance-matched quarter-wave films and damping stabilized solutions—which can both be obtained by coating a high-density mirror with a single lower-density film.

©1985 The American Physical Society

URL: http://link.aps.org/abstract/PRB/v32/p5068
DOI: 10.1103/PhysRevB.32.5068
PACS: 78.65.-s, 76.80.+y, 42.78.Hk

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