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GaN-based distributed Bragg reflector for high-brightness LED and solid-state lighting
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2007
Year
Optical MaterialsEngineeringOptical TestingComprehensive Numerical ModelOptical PropertiesBragg ReflectorGuided-wave OpticComputational ElectromagneticsOptical SystemsReflectancePhotonicsElectrical EngineeringNew Lighting TechnologyAluminum Gallium NitrideThin-film OpticsDepth-graded Multilayer CoatingSolid-state LightingApplied PhysicsGan Power DeviceDistributed Bragg ReflectorsOptoelectronicsDiffractive Optic
A comprehensive numerical model for distributed Bragg reflectors (DBRs) based on thin-film optics is developed. Detailed refractive-index calculations for GaN, AlN, AlGaN, and InGaN can also be included in this numerical model. This model can predict DBR performances for refractive-index variations, layer-thickness fluctuations, and the number of quarter-wave stack pairs in DBR as well different light polarizations.