Patent ID: 9190576
Filing Date: 2015-11-17
Classification: H01L

Abstract:
1. A light emitting device comprising: an excitation source which emits a first light having a first wavelength; and a photonic structure arranged on the excitation source and having phosphors excited by the first light emitted from the excitation source to emit a second light, wherein the photonic structure is a multilayer structure having one dimensional photonic crystal layers, wherein at least one photonic crystal layer of said one dimensional photonic crystal layers contains said phosphors therein, wherein the photonic structure having a photonic bandgap and two bandedges on both ends of the bandgap, wherein the first wavelength coincides with one of the bandedges such that the first light having the first wavelength penetrates into the photonic structure and forms an electromagnetic standing wave as a result of a photonic bandedge effect inside the photonic structure to excite the phosphors to emit the second light, wherein an electric field intensity of the first light inside the photonic structure is greater than an electric field intensity of the first light outside the photonic structure.