Device with optical encoding by plasmon effect and authentication method implementing same

摘要

The device has a set of aggregates (100-130) provided for emitting infrared, visible or ultraviolet rays by luminescence. The aggregates are provided with a luminophore and a surface plasmon effect particle which are suitable for entering into interaction. The aggregates include an envelope that encapsulates the luminophore and the surface plasmon effect particle, and a separating layer covers the luminophore and the surface plasmon effect particle. An independent claim is also included for a method for authenticating an object e.g. textile, paper, glass or plastic, integrating an optical coding device.