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(Color online) Low temperature PL data for a set of SQWs with different QW thicknesses. For increased , a higher shift of the PL peak position between high and low excitation powers indicates the presence of the QCSE.
(Color online) IQE vs temperature for a set of SQWs with QW thicknesses ranging from . Under resonant excitation with low excitation power density we achieved an of 26%.
(Color online) Temperature dependence of the IQE for green/blue and UV-emitting SQWs. For the UV-emitting SQW the RT IQE is only by a factor of 2 smaller compared to the those of the blue and green SQWs, which contain indium.
(Color online) Excitation power dependence of the IQE for green/blue and UV-emitting SQWs. For all structures the basic behavior is very similar.
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