Anti-bunching from plasmon induced non-blinking single CdSe/ZnS quantum dot

摘要

CdSe/ZnS colloidal quantum dot generally exists blinking phenomenon during luminescence process, that remarkably influences its application as a single photon source. In this work, we used the effect of surface plasmon to effectively suppressed the blinking by locating quantum dot on gold film. The anti-bunching character was also observed with g⁽²⁾(0) as low as 0.34 at room temperature. Surface plasmon was shown to enhance the photoluminescence and reduce the lifetime of exciton, which was controlled by excitation power. Our result suggests a potential way to utilize CdSe/ZnS as a high efficient single photon emitter in optics.