RAMAN SCATTERING STUDY OF ACOUSTICAL AND OPTICAL FOLDED MODES IN GaAS/GaAlAs SUPERLATTICES B. Jusserand, D. Paquet, J. Kervarec et A. Regreny J. Phys. Colloques, 45 C5 (1984) C5-145-C5-149 DOI: 10.1051/jphyscol:1984521