Abstract

Soft-x-ray multilayer mirrors are well demonstrated with respect to their high reflectance at near normal incidence. Such multilayer mirrors can be used at other incidence angles off normal though the peak wavelength moves to shorter side as the angle of incidence increase. When we use a mirror at off-normal incidence, polarization dependence appears in the reflectance since p-reflectance generally differs from s-reflectance and decreases rapidly as the angle comes close to the pseudo Brewster angle at which p-reflectance takes minimum. In the soft-x-ray region, the complex refractive indices of material are very close to 1, which indicates the pseudo Brewster angles of multilayer mirrors are around 45°.

© 1994 Optical Society of America