Partner: Sérgio Morelhão

University of Sao Paulo (BR)

Recent publications
1.Domagała J.Z., Morelhão S.L., Sarzyński M., Maździarz M., Dłużewski P., Leszczyński M., Hybrid reciprocal lattice: application to layer stress determination in GaAlN/GaN(0001) systems with patterned substrates, JOURNAL OF APPLIED CRYSTALLOGRAPHY, ISSN: 1600-5767, DOI: 10.1107/S1600576716004441, Vol.49, No.3, pp.798-805, 2016
Abstract:

Epitaxy of semiconductors is a process of tremendous importance in applied science and in the optoelectronics industry. The control of defects introduced during epitaxial growth is a key point in manufacturing devices of high efficiency and durability. In this work, it is demonstrated how useful hybrid reflections are for the study of epitaxial structures with anisotropic strain gradients due to patterned substrates. High accuracy in detecting and distinguishing elastic and plastic relaxations is one of the greatest advantages of measuring this type of reflection, as well as the fact that the method can be exploited in a symmetric reflection geometry on a commercial high-resolution diffractometer.

Keywords:

optoelectronics, Group III-nitride semiconductors, epitaxial growth, X-ray multiple diffraction, interface defects

Affiliations:
Domagała J.Z.-Institute of Physics, Polish Academy of Sciences (PL)
Morelhão S.L.-University of Sao Paulo (BR)
Sarzyński M.-other affiliation
Maździarz M.-IPPT PAN
Dłużewski P.-IPPT PAN
Leszczyński M.-other affiliation