5 January 2001 Simulated annealing in the design of broadband multilayers containing more than two materials
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Abstract
A new method of design for multilayer structures with broadband spectral responses is presented. A stochastic design approach is utilized, based upon a simulated (SA) annealing algorithm, which optimizes the multilayer structure for a particular set of criteria. In particular, we consider a mirror for which the requirement is for high reflectivity, over a broad wavelength range, in the soft x-ray region, as might be compatible with the output from a laser plasma source. The design algorithm is used to maximize a merit function for the structure by manipulating the ordering, the thickness and the material types of each of the constituent layers. The merit function may also be configured to include a number of other desirable properties for the high reflectivity mirror including broad angular response, polarization response and uniformity of reflectivity over a prescribed wavelength range.
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Keith Powell, Jamie M. Tait, Alan G. Michette, "Simulated annealing in the design of broadband multilayers containing more than two materials", Proc. SPIE 4145, Advances in X-Ray Optics, (5 January 2001); doi: 10.1117/12.411645; https://doi.org/10.1117/12.411645
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