Review—Status and Challenges in Hetero-epitaxial Growth Approach for Large Diameter AlN Single Crystalline Substrates

Deep-uv Transparent Bulk Single-crystalline Aln Substrates

Bulk aluminium nitride (AlN) is a very promising substrate material for UV optoelectronics based on AlGaN ternary compounds. AlN single crystals exceeding 1'' in diameter can now be grown by physical vapour transport (PVT). UV transparency is of high interest for UV devices designed to emit through the substrate. We report on 500 μm thick bulk AlN substrates with plain UV transmittance of 50% (...

Multispectral absorptance from large-diameter InAsSb nanowire arrays in a single epitaxial growth on silicon

Vertical III-V nanowires are capable of resonant absorption at specificwavelengths by tuning the nanowire diameter, thereby exceeding the absorption of equivalent thinfilms. These propertiesmay be exploited to fabricatemultispectral infrared (IR) photodetectors, directly integratedwith Si, without the need for spectral filters or vertical stacking of heterostructures as required in thinfilm dev...

Aqueous Epitaxial Growth of ZnO on Single Crystalline Au Microplates

Epitaxial ZnO thin films were grown on single crystalline Au microplates from an aqueous solution at 90 °C. The composite structures were approximately 100 μm wide. The epitaxial ZnO films were smooth, continuous, and several micrometers thick. We examined the epitaxial relationship between the ZnO and Au through scanning electron microscopy, electron backscatter diffraction, high-resolution tr...

Organometallic vapor phase epitaxial growth of GaN on ZrN/AlN/Si substrates

Epitaxial growth of highly-crystalline spinel ferrite thin films on perovskite substrates for all-oxide devices

The potential growth modes for epitaxial growth of Fe3O4 on SrTiO3 (001) are investigated through control of the energetics of the pulsed-laser deposition growth process (via substrate temperature and laser fluence). We find that Fe3O4 grows epitaxially in three distinct growth modes: 2D-like, island, and 3D-to-2D, the last of which is characterized by films that begin growth in an island growt...