OPTICAL DEVICE

摘要

An optical device (10) comprises a substantially planar first layer, which in this example is a layer of gold (14), supported by a silicon substrate layer (12), in the form of a silicon wafer (12). The gold layer (14) is formed with a pattern of solid shaped elements, in the form of (left-handed) gammadions. The gammadions have a size of between 700nm and 4 mu and are arranged in a tiled regular square pattern.