Preparation and Periodic Emission of Superlattice CdS/CdS:SnS2 Microwires

Abstract: Semiconductor superlattice micro-/nanowires could greatly increase the versatility and power of modulating electronic (or excitonic, photonic) transport, optical properties. In this communication, we report growth of a semiconductor CdS/CdS: SnS2 superlattice microwire through a coevaporation technique with microenvironmental control. Such a novel superlattice mi-crowire can modulate the exciton and photons to show multipeak emissions with periods in a wide spectral range, which arise in the 1-d photon crystal and confined exciton emission. This system can be widely used in producing multicolor emissions, low-threshold lasing, study light-matter interaction, slow light engi-neering, and weak nonlinear optical devices. One-dimensional (1D) nanostructures with modulated compositions and microstructures have gained a tremendous amount of attention in the past few years due to their fascinating chemistry and size-, shape-