Design method of the mirror and dispersive multilayer mirror

摘要

(57) [summary] negative group delay dispersion mirror (NGDD mirror) multi-layer structure, layer groups after you and serve as a main to give the reflection bandwidth and reflection level of desired along with the reflection moving variance that varies smoothly and low and, it is loosely defined as a pre-layer group that serves as a main to causing a high reflection phase dispersion necessary to provide bandwidth and NGDD desired level. Before layer group are dependent on multiple resonant trapping mechanism as the effective resonant cavity of two or more of using the sub-quarter-wave layer (s) that forms a phase dispersion to give NGDD substantially constant. In certain embodiments of the structure, reducing the number of dielectric layers required for using a substrate or base layer of highly reflective metal, to give a highly reflective.