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Picosecond dynamics and stimulated emissions of excitons in Zn1-xCdxSe/ZnSe quantum wells

โœ Scribed by Takeham Tsutsumi; Jen Y. Jen; Izuru Souma; Yasuo Oka

Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
174 KB
Volume
16
Category
Article
ISSN
0749-6036

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โœฆ Synopsis

The dynamics and stimulated emission processes of the exciton luminescence are studied in quantum wells ( (Q W s) ) of the (\mathrm{Zn}_{1-\mathrm{x}} \mathrm{Cd} \mathrm{Se} / \mathrm{ZnSe}) system. A multiquantum well (MOW) structure shows an exciton lifetime of (150-280 \mathrm{ps}) and a stimulated emission effect due to exciton-exciton scattering as well as due to electron-hole plasma recombination. A combined-QW structure in which a single quantum well (SQW) is located adjacent to MQWs shows a tunneling process of the excitons from the MQWs through the barriers to the SQW. The stimulated emission takes place in the SQW due to phase space filling effects of the excitons. These observed stimulated emission processes are highly related to the blue-laser-diode operation at both low and room temperatures.

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