Gain coefficient involving excitonic transitions is calculated for unstrained as well as strained ZnCdSe/ZnMgSSe multiple quantum well (MQW) lasers as a function of operating wavelength and current density. This paper models the behavior of radiative recombination involving excitons as well as free carriers in strained layer blue-green quantum well lasers, and predicts for the first time a low threshold operation in tensile strained active layers. For example, the tensile strained Zn/sub .8/Cd/sub .2/Se-ZnMgSSe quantum well lasers are shown to operate at threshold current density as low as 180 A/cm/sup 2/, which is about the half of the compressive strain case.
Prediction of lower current threshold in tensile strained ZnCdSe/ZnMgSSe multiple quantum well blue-green lasers
Proceedings of LEOS'94 ; 1 ; 341-342 vol.1
1994-01-01
122390 byte
Conference paper
Electronic Resource
English
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