Synchrotron X-Ray Diffraction Topography of Semiconductor Heterostructures

7 VP T J üú û üŗ 4 J W VN»»S » û þĀŗ VS O ". . *Ć Ğ Ğ /,(Ą ðĞ Ć Ć ăāĂĚ ăÿüĚ Āú Ě þăüû Ě üŗ Preface " Jokainen tsäänssi on mahdollisuus! " – Matti Nykänen (Every chance is an opportunity) The work presented in this thesis was carried out in Optoelectronics Laboratory , of Electrical Engineering between 2003 and 2012. I want to express my sincere gratitude to Professor Harri Lipsanen for supervising this thesis, and for the opportunity to work on such interesting field as material science is. I am deeply grateful and indebted to the advisor of this thesis, Prof. Turkka O. Tuomi for his invaluable suggestions and insightful advice concerning synchrotron sciences and this thesis. I would also like to thank Professor Tuomi for the numerous in-sightful discussions we have had, and for the continued support during the rather long while this thesis was slowly progressing. I thank Dr. Markku Sopanen for the valuable advice and amicable help concerning this thesis. I will gladly take the opportunity here to thank Dr. Varis for the swift cooperation in the laboratory and on the field, and for being good people. Hey, let's go and have a beer together some of these days! the University of Hamburg for precious bits of information and science, as well as for the many insightful debates we have had. I want to express my gratitude to my parents Heikki and Terttu, and to my dear sister Vilja for their love and support. Finally, I thank my dear partner Dr. Annika for all the love and understanding!