Open AccessPHOT OREFLECTANCE SPECTROSCOPY OF GaAs DOPING SUPERLATTICES
Author(s) -
Tang Yin-Sheng,
Wang Beng-Shen,
Desheng Jiang,
Zhuang Wei-Hua,
J.-Q. Liang
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.157
Subject(s) - superlattice , doping , spectroscopy , materials science , derivative (finance) , beam (structure) , molecular beam epitaxy , modulation (music) , condensed matter physics , atomic physics , optics , physics , optoelectronics , nanotechnology , quantum mechanics , epitaxy , layer (electronics) , acoustics , financial economics , economics
Room temperature photoreflectances of a MBE GaAs doping superlattice were measured under different pump beam intensities. A series of fine structures corresponding to forbidden transitions (△n≠0) were observed af lower pump beam intensities. This means it is net a third derivative spectrum. A first derivative lineshape of photoreflectance for doping super-lattices was suggested, and the modulation mechnism was discussed. Theorefical calculations give a good explanation to the experiments.