机构地区: 五邑大学
出 处: 《五邑大学学报(自然科学版)》 1998年第3期1-3,共3页
摘 要: 利用射频(RF)磁控共溅射技术,以光学石英玻璃为基片,在不同基片温度下制备了系列GaAs/SiO2半导体纳米颗粒镶嵌薄膜样品。采用岛津光谱仪,对薄膜在200至2000nm波段范围内的透射光谱进行了测量。结果表明,与GaAs块体材料相比,薄膜样品吸收边发生明显的蓝移;且随着基片温度的降低,蓝移量增大。而当基片温度达到300℃时,光谱中出现了明显的吸收峰。量子限域效应是导致这种结果的主要原因。 Abstract A series of GaAs/Sio_2 nano-granular films were deposited on crystal glass slices with RF magnetron co-sputtering technique under different substrate temperatures and the influence of substrate temperature on the optical transmission spectra was investigated in the range of 200~2000 nm.Results show that the band edges were blue-shifted compared with that of the bulk material,and the lower the temperature,the larger the blue-shifting.There was a distinct valley in the spectrum when temperature reached 300℃.Quantum confinement is responsible for this result.
领 域: [电子电信]