Ultrafast carrier dynamics in semiconductor nanowires

摘要: Semiconductor nanowires (NWs) are nanostructures with a number of novel optical and electronic properties that offer great promise for applications in areas including nanoelectronics, thermoelectrics, sensing, nanophotonics. To realize the full potential these unique nanosystems, however, deep understanding their response to excitation on sub-picosecond time scale is required. Here, we review recent ultrafast studies carrier dynamics semiconductor NWs. These experiments have been performed different materials as function both intrinsic NW parameters such diameter doping well experimental photoexcited density wavelength. A variety phenomena, one-dimensional (1D) exciton dynamics, rapid trapping at surface bulk defects, lasing from an electron-hole plasma (EHP) observed. first measurements tantalizing hint rich physics yet be discovered quasi-1D systems. Ultrafast spectroscopy can track temporal evolution ; populations NWs femtosecond resolution.