Accession Number : ADA313811

Title :   High Electric Field Quantum Transport: Submillimeter Wave AC Stark Localization in Vertical and Lateral Superlattices.

Descriptive Note : Final rept. 1 Apr 93-31 Mar 96,

Corporate Author : CALIFORNIA UNIV SANTA BARBARA QUANTUM INST

Personal Author(s) : Allen, S. J.

PDF Url : ADA313811

Report Date : 31 MAR 1996

Pagination or Media Count : 6

Abstract : Nonlinear electron dynamics in semiconductor quantum structures define a rich scientific arena with potential impact on novel devices in the terahertz regime. An important concept is photon assisted transport marked by new transport channels, opened by the absorption or emission of one or more photons. Experiments carried out during this project have exposed several phenomena, new to semiconductor quantum devices, antenna coupled to intense terahertz: electric fields: (1) Multiple photon assisted tunneling, accompanied by both stimulated emission and absorption of up to three terahertz photons. (2) Electric field domains supported by multiphoton assisted sequential resonant tunneling. (3) Terahertz driven dynamic localization and absolute negative resistance. (4) A classical I quantum crossover frequency. (5) Multiphoton resonances with Bloch oscillation in electrically biased miniband superlattices. These experiments have opened the arena of photon assisted transport to semiconductor devices and paved the way for future teraherz: electronics based on quantum transport in semiconductor nanostructures.

Descriptors :   *TUNNELING(ELECTRONICS), SUPERLATTICES, FREE ELECTRON LASERS, TRANSPORT, QUANTUM ELECTRONICS, SUBMILLIMETER WAVES, NEGATIVE RESISTANCE CIRCUITS.

Subject Categories : Electricity and Magnetism

Distribution Statement : APPROVED FOR PUBLIC RELEASE