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Growth and characterization of GaAs/AlGaAs core-shell nanowires (NWs) are reported. Using the VLS (vapor-liquid-solid) mechanism, GaAs NWs oriented perpendicularly to the substrate were grown on GaAs (111) B substrate. Using the metalorganic chemical vapor deposition (MOCVD) growth mode, AlGaAs shells were grown on GaAs NWs sidewalls. Single crystal and pure zinc-blende structure are achieved for...
This paper investigates the influence of the GaAs substrate on the transmission performance of quarter-wave-stacks' Distributed Brag Reflector (DBR)-based Fabry-Pérot (F-P) filter formed by heteroepitaxial growth, using Transfer Matrix Method (TMM) theoretically. According to our simulation, the designed resonant transmission peak of the filter deteriorates by splitting up with the substrate thickness...
We have investigated the growth and photoluminescence (PL) characteristics of GaAs/AlGaAs core-multishell nanowires (NWs). Theses NWs are grown by means of vapor-liquid-solid (VLS) method for cores growth and metalorganic chemical vapor deposition (MOCVD) for multishell growth on GaAs (111)B substrate. The crystallographic quality is perfect in the body of GaAs/AlGaAs core-multishell NWs and a small...
A monolithically integrated photodetector array used for multiwavelength receiving was realized by growth of an InP-In0.53Ga0.47As-InP p-i-n structure on a GaAs/AlGaAs Fabry-Perot filter. The filter with a multistep cavity was fabricated by wet etching and regrowth. Each photodetector in the array detects a different wavelength, so the array functions as a multiwavelength receiver. The high-quality...
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