InP substrate orientation (100), (110)A, (110)B, (I I I)A, (111)B, (112)A a
nd (112)B significantly affects phase decomposition and ordering. Through T
EM, AFM and photoreflectance investigations, the effect of MBE growth on th
e above surfaces has been determined. Features related to phase decompositi
on due to (110)A, (111)B and (112)B surfaces have been identified. Anisotro
py in optical transitions in samples grown on (110)A and (110)B InP has bee
n identified through photoreflectance investigations. (C) 2001 Elsevier Sci
ence B.V. All rights reserved.