Rho, H. Lim, J-R. Song, J. D. Choi, W. J. Lee, Y. T. 2024-01-20T21:00:25Z 2024-01-20T21:00:25Z 2021-09-05 2009-09 0377-0486 https://pubs.kist.re.kr/handle/201004/132196 We report Raman scattering from (GaP)(n)(InP)(n) (n = 1, 1.7, 2) short-period superlattice (SPS) structures to study the effect of lateral composition modulation (LCM) on the behavior of optical phonons. Cross-sectional transmission electron microscope images revealed that LCM was formed with complex pattern in the n = 1.7 and n = 2 samples grown at 490 degrees C. Interestingly, both the InP- and the GaP-like longitudinal optical (LO) phonon energies increased systematically as the number of monolayers was increased from n = 1 to n = 2. A significant broadening of the phonon line shapes was also observed for the n = 1.7 and n = 2 samples. In contrast, for samples grown at 425 degrees C, both the increase of the LO phonon energies and the broadening of the phonon line shapes were observed only when n = 1.7. Our results demonstrate that the optical phonons in the (GaP)(n)/(InP)(n) SPS structures are significantly affected in the occurrence of LCM related to the growth temperature and the number of monolayers. Copyright (C) 2009 John Wiley & Sons, Ltd. English WILEY LATERAL COMPOSITION MODULATION PHASE-SEPARATION SUPERLATTICES INITIATION EVOLUTION Raman scattering studies of (GaP)(n)/(InP)(n) (n=1, 1.7, 2) short-period superiattice structures Article 10.1002/jrs.2256 1 JOURNAL OF RAMAN SPECTROSCOPY, v.40, no.9, pp.1178 - 1182 JOURNAL OF RAMAN SPECTROSCOPY 40 9 1178 1182 scie scopus 000270692700014 2-s2.0-70349792892 Spectroscopy Spectroscopy Article LATERAL COMPOSITION MODULATION PHASE-SEPARATION SUPERLATTICES INITIATION EVOLUTION Raman scattering short-period superlattice lateral composition modulation transmission electron microscope