Optics Express · 2020 · 20 citations · 49 references
EngineeringElectrical EngineeringMaterials ScienceNanotechnologyOptoelectronicsPhotonicsLight SourcesLight-emitting DiodesNanowiresOptoelectronic DevicesOptoelectronic MaterialsPhotonic MaterialsExtraction EfficiencyHexagonal LatticesLight ExtractionLight Extraction EfficiencyLight-emitting DevicesNanowire ArraysNanowire Light-emitting DiodesUltraviolet Light-emitting Diodes
In this paper, AlInN nanowire ultraviolet light-emitting diodes (LEDs) with emission at ∼299 nm have been successfully demonstrated. We have further studied the light extraction properties of these nanowire LEDs using photonic crystal structures with square and hexagonal lattices of nanowires. The light extraction efficiency (LEE) of the periodic nanowire LED arrays was found to be significantly increased as compared to random nanowire LEDs. The LEEs reach ∼ 56%, and ∼ 63% for the square and hexagonal photonic crystal-based nanowire structures, respectively. Moreover, highly transverse-magnetic polarized emission was observed with dominant vertical light emission for the AlInN nanowire ultraviolet LEDs.
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Optical constants of epitaxial AlGaN films and their temperature dependence
Daniel Brunner, H. Angerer, E. Bustarret et al. · Journal of Applied Physics · 1997 · 601 citations