Defect-free GeSn alloy strips on Si by Sn self-catalyzed MBE method

The lateral growth of GeSn strips on Si(111) has been successfully achieved by Sn self-catalyzed MBE method. The effect of Sn catalysts on morphology and the quality of the materials were studied. The high quality GeSn on Si will contribute to development of Si-based optoelectronics.