An optical multilayer structure has a substrate, a light-absorbing first layer in contact with the substrate, a gap portion having a changeable size capable of causing an optical interference phenomenon, and a second layer. By changing the size of the gap portion, an amount of reflection, transmission,...http://www.google.com.au/patents/US6940631?utm_source=gb-gplus-sharePatent US6940631 - Optical multilayer structure, optical switching device, and image display
