GROWTH AND CHARACTERIZATION OF NOVEL MGSE ZNCDSE SUPERLATTICE QUASI-QUATERNARIES ON INP SUBSTRATES/

Novel MgSe/ZnCdSe superlattice quasi-quaternaries (SL-QQs) lattice-mat ched to (1 0 0) InP substrates were grown by molecular beam epitaxy fo r the first time. From the X-ray diffraction measurements of the SL-QQ s, it was made sure that the designed superlattice periods were actual ly obtained. While, the equivalent Mg composition of the SL-QQs was co ntrolled from 0.12 to 0.60 by changing the MgSe layer thickness ratio to the superlattice period. Optical properties of the SL-QQs were inve stigated by photoluminescence (PL) and reflectance measurements at 15 K. As a result, the PL peak energies of the SL-QQs monotonically incre ased from 2.24 to 2.91 eV with increasing the Mg composition from 0.12 to 0.60 like MgZnCdSe bulk compounds. (C) 1998 Elsevier Science B.V. All rights reserved.