Electronic Resource
Woodbury, NY
:
American Institute of Physics (AIP)
Applied Physics Letters
56 (1990), S. 1046-1048
ISSN:
1077-3118
Source:
AIP Digital Archive
Topics:
Physics
Notes:
Both 1→2 and 1→3 intersubband transitions have been observed in a step quantum well structure consisting of 60 A(ring) GaAs wells, 90 A(ring) Al0.18Ga0.82As steps, and 280 A(ring) Al0.44 Ga0.56As barriers. The transition energy and oscillator strength are 112 meV and 0.23 for the 1→2 transition and 150 meV and 0.15 for the 1→3 transition, respectively. The asymmetric property of a step quantum well allows the normally forbidden 1→3 transition to occur. The relaxation of the selection rule suggests a possibility of using optical pumping for infrared laser applications.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.102610
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