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We investigate the power-dependent luminescence of CdSe/ZnS semiconductor quantum dots closely packed layerby-layer in the proximity of a silver nanorod array cavity.It is found that the emission peak shifts significantly to the longer wavelengths as the excitation power increases,especially when the longitudinal surface plasmon resonance of the Ag nanorod array cavity is adjusted to be close to the emission wavelength.The equivalent gain varies with the coating layer of CdSe/ZnS semiconductor quantum dots and the excitation power is also studied to explain this interesting spectrum-shifting effect.These findings could find applications in the dynamic information processing of active plasmonic and photonic nanodevices.
We investigate the power-dependent luminescence of CdSe / ZnS semiconductor quantum dots closely packed layer by-layer in the proximity of a silver nanorod array cavity. It is found that the emission peak shifts significantly to the longer wavelengths as the excitation power increases, even when the longitudinal surface plasmon resonance of the nan nanorod array cavity is adjusted to be close to the emission wavelength. The equivalent gain varies with the coating layer of CdSe / ZnS semiconductor quantum dots and the excitation power is also studied to explain this interesting spectrum-shifting effect. The finding could find applications in the dynamic information processing of active plasmonic and photonic nanodevices.