Schematic band diagram for the multiple quantum wells with barrier formed by tensile-strained and unstrained layers. and are the thickness of the and barriers, respectively. is the thickness of the compressive strained active layer.
CW light output power versus injection current measured at room temperature (RT) for a ridge waveguide triple quantum wells. The inset shows the lasing spectrum of the MQW at an injection current of .
The in-plane energy dispersion curves of the quantum wells with . (a) and (b) are the conduction and valence subbands, respectively. Solid line is the result calculated using 8-band model, dashed line is that of the 10-band model.
(a) Maximum optical gain of the TE-mode as a function of carrier density. (b) Radiative current density as a function of carrier density. Solid lines are for structure , dashed lines are for structure .
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