Accession Number : ADP007882

Title :   Terhertz Absorption between Split Subbands in Coupled Quantum Wells,

Corporate Author : AT AND T BELL LABS HOLMDEL NJ

Personal Author(s) : Roskos, Hartmut ; Nuss, Martin C. ; Shan, Jagdeep ; Tell, Ben ; Cunningham, Jack

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Two quantum systems with energy levels in resonance with each other experience a splitting of these levels when the wavefunctions of the systems overlap. In semiconductor structures consisting of pairs of closely spaced quantum wells the wavefunction overlap of charge carriers in the wells leads to a novel kind of intersubband transition. To date, this transition has been studied by interband absorption and luminescence and, most recently, by four-wave-mixing experiments Leo, 1990. Here, we report of the first direct absorption measurements of the split-subband transition in coupled quantum wells.

Descriptors :   *RESONANCE, *WAVE FUNCTIONS, *QUANTUM ELECTRONICS, ABSORPTION, CHARGE CARRIERS, ENERGY LEVELS, LUMINESCENCE, MEASUREMENT, MIXING, OVERLAP, SEMICONDUCTORS, SPLITTING, STRUCTURES, TRANSITIONS.

Subject Categories : Solid State Physics
      Quantum Theory and Relativity

Distribution Statement : APPROVED FOR PUBLIC RELEASE