Title :
Observations of room-temperature excitons in InGaP/InGaAlP MQW structures
Author :
Tanaka, Hiroya ; Kawamura, Yuriko ; Asahi, H.
Author_Institution :
NTT Electrical Communications Laboratories, Atsugi, Japan
Abstract :
Room-temperature excitonic resonances in the optical absorption spectrum of InGaP/lnGaAlP multiquantum wells (MQWs) are observed for the first time. Well resolved heavyhole and light-hole excitons are observed at 100K. From the step-like structure of the absorption spectrum, the conduction-band discontinuity ¿Ec is estimated to be 0.46 of the bandgap difference ¿Eg.
Keywords :
III-V semiconductors; aluminium compounds; excitons; gallium compounds; indium compounds; luminescence of inorganic solids; photoluminescence; semiconductor superlattices; visible and ultraviolet spectra of inorganic solids; III-V semiconductor; InGaP-InGaAlP multiple quantum wells; MQW structures; bandgap difference; conduction-band discontinuity; heavy hole excitons; light-hole excitons; optical absorption spectrum; photoluminescence; room-temperature excitons; step-like structure;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19870118
