Wafer-scale strain engineering of ultrathin semiconductor crystalline layers.

Leite, Marina S; Warmann, Emily C; Kimball, Gregory M; Burgos, Stanley P; Callahan, Dennis M; Atwater, Harry A · Adv Mater · 2011

basic_science · Level V

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Abstract

The fabrication of a wafer-scale dislocation-free, fully relaxed single crystalline template for epitaxial growth is demonstrated. Transferring biaxially-strained Inx Ga1-x As ultrathin films from InP substrates to a handle support results in full strain relaxation and the Inx Ga1-x As unit cell assumes its bulk value. Our realization demonstrates the ability to control the lattice parameter and energy band structure of single layer crystalline compound semiconductors in an unprecedented way.