Abstract
Reflectivities at nongrazing incidence angles, and in particular at normal or near-normal incidence, may be enhanced by causing multiple reflections to add in phase, in a manner analogous to Bragg reflection from a crystal. The Bragg condition for mth-order constructive interference is (Figure 4.1) that the angle θ that the incident radiation, of wavelength λ, makes with the crystal planes is equal to 0m where
and d is the spacing between the planes. Typical crystals have spacings of a few tenths of a nanometer and therefore condition (4.1) cannot be satisfied for soft X rays with wavelengths of 1-10 nm. It is necessary to manufacture structures with the required spacings, and these are known as multilayer mirrors.
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© 1986 Plenum Press, New York
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Michette, A.G. (1986). Reflective Optics for Soft X Rays II Multilayer Mirrors. In: Optical Systems for Soft X Rays. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-2223-8_4
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DOI: https://doi.org/10.1007/978-1-4613-2223-8_4
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