FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Power-Dependent Luminescence of CdSe/ZnS Nanocrystal Assembled Layer-by-Layer on a Silver Nanorod Array |
WANG Ya-Lan, CHENG Zi-Qiang, MA Liang, PENG Xiao-Niu, HAO Zhong-Hua, WANG Qu-Quan** |
Department of Physics, Wuhan University, Wuhan 430072
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Cite this article: |
WANG Ya-Lan, CHENG Zi-Qiang, MA Liang et al 2015 Chin. Phys. Lett. 32 034205 |
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Abstract 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, 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.
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Published: 26 February 2015
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PACS: |
42.50.Ct
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(Quantum description of interaction of light and matter; related experiments)
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78.40.Fy
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(Semiconductors)
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52.25.Tx
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(Emission, absorption, and scattering of particles)
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78.67.Bf
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(Nanocrystals, nanoparticles, and nanoclusters)
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Abstract
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