T. Tsutsumi et al., PICOSECOND DYNAMICS AND STIMULATED EMISSIONS OF EXCITONS IN ZN1-XCDXSE ZNSE QUANTUM-WELLS/, Superlattices and microstructures, 16(1), 1994, pp. 41-45
The dynamics and stimulated emission processes of the exciton luminesc
ence are studied in quantum wells (QWs) of the Zn1-xCdxSe/ZnSe system.
A multiquantum well (MQW) structure shows an exciton lifetime of 150-
280 ps and a stimulated emission effect due to exciton-exciton scatter
ing as well as due to electron-hole plasma recombination. A combined-Q
W structure in which a single quantum well (SQW) is located adjacent t
o MQWs shows a tunneling process of the excitons from the MQWs through
the barriers to the SQW. The stimulated emission takes place in the S
QW due to phase space filling effects of the excitons. These observed
stimulated emission processes are highly related to the blue-laser-dio
de operation at both low and room temperatures.