SWITCHABLE OPTICAL FILTER WITH PHOTONIC CRYSTALS

摘要

The invention relates to an optical filter (1) for reception of an incident laser beam (2), comprisign a non-linear material and able to switch from a transparent to an opaque state depending on the incident beam. The optical filter comprises a 3D photonic crystal (4) in which micro-structures (3) of the non-linear material are arranged, separated by layers of crystal.