Accession Number : ADP007634
Title : Terahertz 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 : 7
Abstract : The transition between split subbands (design splitting: 5 meV) in n-doped coupled quantum wells is investigated by time-domain spectroscopy with ultrafast pulses of far-infrared radiation. This very strong transition has a linewidth of 2.5 meV. The maximum absorption is observed at 4.2 meV photon energy, lower than the design splitting. We attribute this down-shift of the peak absorption tentatively to the influence of many-body interactions which lead to correction terms for the calculated transition energy in the same order of magnitude as the transition energy itself.
Descriptors : *FAR INFRARED RADIATION, *RESONANCE ABSORPTION, *ELECTROOPTICS, *INFRARED DETECTION, ABSORPTION, ENERGY, FAR INFRARED RADIATION, INFRARED RADIATION, INTERACTIONS, PHOTONS, PULSES, RADIATION, SPECTROSCOPY, SPLITTING, TIME DOMAIN, TRANSITIONS, GALLIUM ARSENIDES, DIPOLE ANTENNAS, SYMPOSIA.
Subject Categories : Electrooptical and Optoelectronic Devices
Infrared Detection and Detectors
Distribution Statement : APPROVED FOR PUBLIC RELEASE