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|1. (WO2017020407) VISIBLE AND NEAR-INFRARED LIGHT ULTRA-BROADBAND ABSORBER AND MANUFACTURING METHOD THEREOF|
|Title:||VISIBLE AND NEAR-INFRARED LIGHT ULTRA-BROADBAND ABSORBER AND MANUFACTURING METHOD THEREOF|
A visible and near-infrared light ultra-broadband absorber and manufacturing method thereof. The visible and near-infrared light ultra-broadband absorber comprises a substrate (1) and 5 layers of optical thin-films. A bottommost thin-film is a metal bottom absorption layer (2). A top germanium layer (3) is arranged above the metal bottom absorption layer. Three layers of reflection reduction films (4-6) are arranged above the top germanium layer. The three layers of the reflection reduction films from the bottom up have decreasing material reflectance. The embodiments of the invention realize angle-insensitive ultra-broadband absorption of a visible or near-infrared light on the basis of the metal absorption layer blocking an incident effect, combined with the germanium layer and the broadband reflection reduction layers, and is simpler in structure.