Yeh, Dong-Ming and Chen, Cheng-Yen and Lu, Yen-Cheng and Huang, Chi-Feng and Yang, C. C. (2007) Formation of various metal nanostructures with thermal annealing to control the effective coupling energy between a surface plasmon and an InGaN/GaN quantum well. NANOTECHNOLOGY, 18 (26).
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Official URL: http://www.iop.org/EJ/abstract/0957-4484/18/26/265...
We demonstrate the variations of the photoluminescence (PL) spectral peak position and intensity through the surface plasmon (SP) coupling with an InGaN/GaN quantum well (QW) by forming Ag nanostructures of different scale sizes on the QW structure with thermal annealing. By transferring an Ag thin film into a nanoisland structure, we can not only enhance the PL intensity, but also adjust the SP dispersion relation and hence red-shift the effective QW emission wavelength. Such an emission spectrum control can be realized by initially coating Ag films of different thicknesses. Although the screening process of the quantum-confined Stark effect, which can result in PL spectrum blue-shift and intensity enhancement, also contributes to the variations of the emission behaviour, it is found that the SP-QW coupling process dominates in the observed phenomena.
|Subjects:||Physical Science > Quantum phenomena|
Material Science > Nanostructured materials
Physical Science > Photonics
|Deposited On:||22 Dec 2009 09:34|
|Last Modified:||22 Dec 2009 09:34|
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