Application of a mode-matching technique to quantum-wire transitions and discontinuities

Andreas Weisshaar; Jenifer E. Lary; Stephen M. Goodnick; Vijai K. Tripathi

doi:10.1117/12.20772

1 October 1990 Application of a mode-matching technique to quantum-wire transitions and discontinuities

Andreas Weisshaar, Jenifer E. Lary, Stephen M. Goodnick, Vijai K. Tripathi

Proceedings Volume 1284, Nanostructure and Microstructure Correlation with Physical Properties of Semiconductors; (1990) https://doi.org/10.1117/12.20772
Event: Advances in Semiconductors and Superconductors: Physics Toward Devices Applications, 1990, San Diego, CA, United States

Abstract

Modal expansions of the wave function and a mode-matching technique are used to calculate the transmission characteristics of semiconductor quantum wire structures assuming hard wall confmement in the transverse directions. Results for cascaded right-angle bends and periodic structures in a split-gate configuration are presented. A sharp transition to a plateau of zero conductance is observed for the double bend configuration. For periodic structures in the split-gate configuration, highly resonant behavior similar to that in tunneling resonant diodes is found. Calculated current-voltage characteristics for the case of two narrow constrictions are shown, exhibiting a region of negative differential resistance.

Citation Download Citation

Andreas Weisshaar, Jenifer E. Lary, Stephen M. Goodnick, and Vijai K. Tripathi "Application of a mode-matching technique to quantum-wire transitions and discontinuities", Proc. SPIE 1284, Nanostructure and Microstructure Correlation with Physical Properties of Semiconductors, (1 October 1990); https://doi.org/10.1117/12.20772

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