Strain accommodation within porous buffer layers in heteroepitaxial growth

Abstract

We report on the electrochemical preparation of GaAs porous substrates, their heat treatment in As rich environment and their overgrowth by metalorganic vapor phase epitaxy (MOVPE). The goal is to demonstrate that porous substrates are capable of accommodating strain at the interface with highly lattice mismatched In(x)Ga(1-x)As layers.