Anti-bunching and luminescence blinking suppression from plasmon-interacted single CdSe/ZnS quantum dot

CdSe/ZnS colloidal quantum dots generally exist as blinking phenomena during the luminescence process that remarkably influences its applications. In this work, we used the surface plasmonic effect to effectively modulate single quantum dots. Obvious contrasts have been observed by comparing single quantum dots on silica and gold films. The surface plasmon is shown to obviously suppress the blinking of single quantum dots. With further demonstrated second-order correlation measurements, an anti-bunching effect was observed. The anti-bunching dip gives the smallest value of g((2))(0) = 0.15, and the lifetime of the exciton has been reduced. This method presents the application's potential towards tunable high-emitting-speed single photon sources at room temperature. (C) 2010 Optical Society of America