Physica status solidi. C, Conferences and critical reviews/Physica status solidi. C, Current topics in solid state physics · 2010 · 36 citations · 2 references
Natural SciencesMaterials EngineeringMaterials ScienceOptical MaterialsOptoelectronicsSpectroscopyAluminum OxidesLuminescent MaterialsOptical Thin FilmsOptoelectronic MaterialsThin Film Optical PropertiesUltraviolet-visible SpectroscopyAluminum NitrideOptical AbsorptionOptical Absorption CoefficientOptical Absorption SpectraPolarizationSublimationUv Light Applications
Abstract Bulk aluminum nitride (AlN) is a very promising substrate material for ultraviolet (UV) and deep‐UV optoelectronics. Bulk AlN crystals grown using multiple sublimation of the source material show plain absorption coefficients below 18 cm –1 in the UV and deep‐UV range of 3.3–5.6 eV (380–220 nm) in the whole sample areas, regardless of sample orientation or light polarization direction. Homogeneity and polarization dependence of optical absorption in the UV and deep‐UV range of such samples is investigated. Finally, cathodoluminescence spectra of samples grown with and without multiple resublimation of the source material are compared. (© 2010 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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