Investigation of the optical gap in Ge nanowires.

ORAL

Abstract

We investigate the role of quantum confinement for the optical and electronic properties of Ge nanowires.~ Real space pseudopotentials constructed within density functional theory were used to solve the electronic structure problem.~ We predict the quasi-particle and optical gaps as a function of the diameter up to approximately 3 nm for wires oriented along the (110) and (111) directions.~ We compare our results to previous work on Si wires.~

–

Authors

  • Jiaxin Han

    The University of Texas at Austin

  • S. P. Beckman

    The University of Texas at Austin

  • James Chelikowsky

    University of Texas at Austin, University of Texas, The University of Texas at Austin, Department of Physics and Chemical Engineering, Institute of Computational Engineering and Sciences, University of Texas, Austin, Texas 78712, USA