Multi-phonon Raman Scattering in GaAs/Al0.28Ga0.72As Super-lattice
Cheng Xing-Kui, Zhou Jun-Ming, Huang Qi, Yan Xun-Ling
Physical Science International Journal · pp. 1–7 · Published 2 Dec 2017
10.9734/PSIJ/2017/37435Abstract
Raman scattering measurement of GaAs/Al0.28Ga0.72As super-lattice has been performed by an incident light with the wave-vector perpendicular to super-lattice growth axis at room temperature. Several peaks in Raman Scattering spectrum are observed. Theoretical analysis shows that the peak at 290 cm-1 may be caused by emission of a longitudinal optical phonon in GaAs/Al0.28Ga0.72As super-lattice, the peak at 584 cm-1 by emission of two ones, and the peak at 876 cm-1 by emission of three ones. The multi-phonon Raman scattering may be resulted from the folded optical phonons in super-lattices.
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