Abstract

A new approach to XUV optics is analyzed based on the holographic fabrication of optical elements, including imaging optics, gratings, lenses, and mirrors. The single-step direct holographic registration of interference patterns produced by two coherent electromagnetic waves is considered in the XUV region for obtaining the desired transmission and reflection of Bragg holographic structures. For this purpose, the properties of the holographic material as well as the applicability of currently available laser sources in terms of their coherence, power, and pulse rate are analyzed. By using the well-known model of XUV wave propagation,¹ two types of Kogelnik's holographic structure are considered for this spectral region, namely, the so-called lossy gratings and mixed gratings. It can be shown that, in spite of high values of the linear absorption coefficient of the recording medium (~5 × 10³ cm⁻¹), even the purely lossy gratings (where only the real part of the refractive-index modulation is taken into account) can lead to relatively high diffraction efficiencies of more than 50%. Finally, the results of Kogelnik's dynamic theory for XUV Lippmann-Bragg structures are compared with the standard multilayer dynamic models by extending the author’s earlier analyses² to the XUV region.

© 1986 Optical Society of America