Patent ID: 7990593

Claim:
A holographic storage material ( 1 ), comprising a polymer film ( 3 ), a metallic first layer ( 4 ), wherein the metallic first layer ( 4 ) is arranged directly or indirectly on the polymer film ( 3 ), a non-metallic second layer ( 5 ), a metallic third layer ( 6 ), wherein the second layer ( 5 ) is arranged between the first layer ( 4 ) and the third layer ( 6 ), and the first layer ( 4 ), the second layer ( 5 ) and the third layer ( 6 ) together have an overall thickness of less than the wavelength of the radiation used for reading, and wherein the first layer ( 4 ), the second layer ( 5 ) and the third layer ( 6 ) together have an optical density (OD) of from 1.9 to 3.