Photonic crystal cavity-based micro/nanodisplay for visible lights

A micro/nanodisplay in a two-dimensional photonic crystal slab has been investigated for visible light applications. By introducing a line-defect waveguide and different point defect resonant cavities, incoming visible lights with different wavelengths can be trapped by the different size cavities and then emitted to the free space when they travel along the line-defect waveguide. Therefore, a colorful surface-emitting display can be achieved on the surface of the photonic crystal slab with all colors ranging from red to violet.