Formation of hexagonal-wurtzite germanium by pulsed laser ablation

A stable phase of relatively large hexagonal-wurtzite germanium (lonsdaleit e) crystals (up to 10 mu m) was formed when germanium was directly deposite d at low pressure using pulsed ultraviolet laser ablation. Films were grown on various substrates at room temperature from a single crystal, cubic ger manium target. Crystallites of the hexagonal-wurtzite phase of germanium we re clearly identified using selected area electron diffraction. Further cha racterizations of the films were made using X-ray diffraction and confocal scanning micro-Raman spectroscopy. (C) 2000 Published by Elsevier Science L td.