Abstract
Surface-plasmon-assisted modal gain enhancement was investigated in Au-hybrid CdSe/ZnS nanocrystal quantum dots. A fivefold enhancement of the modal gain was observed at room temperature in the presence of a Au film by using modal gain contour map analysis, and the photoluminescence intensity and size-selective photoluminescence excitation intensity increased significantly. The enhanced modal gain was attributed to the multiexciton states of neutral and charged biexciton and triexciton.
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