Accession Number : ADP007674

Title :   Quantum Transport of an Electron Wave Packet Across a Heterostructure Discontinuity: Applications in the GaAs/Al sub x Ga sub 1-xAs Heterosystem,

Corporate Author : MICHIGAN UNIV ANN ARBOR DEPT OF ELECTRICAL ENGINEERING AND COMPUTER SCIENCE

Personal Author(s) : Sankaran, Vasu ; Singh, Jasprit

Report Date : 22 MAY 1992

Pagination or Media Count : 6

Abstract : A formalism is presented to study quantum transport properties of electrons in semiconductor heterostructures. The time evolution of multiband electronic states is determined by numerically solving the time dependent Schroedinger equation in the tight-binding representation. We have studied the transport of an electron wavepacket injected from AlxGa1-xAs across Gamma-Gamma and Gamma-X discontinuities into GaAs. The gross transport properties of the transmitted wavepacket are altered within a time scale of the order of 100 fs.

Descriptors :   *SEMICONDUCTOR DEVICES, *TUNNELING(ELECTRONICS), *OPTICAL WAVEGUIDES, DISCONTINUITIES, ELECTRONIC STATES, ELECTRONICS, ELECTRONS, SCALE, SEMICONDUCTORS, TIME, TRANSPORT, TRANSPORT PROPERTIES, WAVE PACKETS, ALUMINUM ALLOYS, GALLIUM ARSENIDES, ELECTROOPTICS, ELECTRONIC STATES, SYMPOSIA.

Subject Categories : Electrooptical and Optoelectronic Devices
      Fiber Optics and Integrated Optics
      Electrical and Electronic Equipment

Distribution Statement : APPROVED FOR PUBLIC RELEASE