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Observations of room-temperature excitons in InGaP/InGaAlP MQW structures

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3 Author(s)
Tanaka, H. ; NTT Electrical Communications Laboratories, Atsugi, Japan ; Kawamura, Y. ; Asahi, H.

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.

Published in:

Electronics Letters  (Volume:23 ,  Issue: 4 )