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Proceedings Paper

Photoluminescence studies on the Dolmen-like plasmonic nanoantennas (Conference Presentation)

Paper Abstract

Localized surface plasmon resonance (LSPR) on metallic nanostructures is able to enhance photoluminescence (PL) emission significantly. However, the mechanism for anomalous blue-shifted peak of PL emission from metallic nanostructures, relative to the corresponding scattering spectra, is still unclear so far. In this paper, we presented the detailed investigations on both the Lorentz-like PL profile with blueshifted peak and Fano-like one with almost unshifted dip, as observed on dolmen-like metallic nanostructures. Such anomalous PL emission profile is the product of the density of plasmon states (DoPS) with Lorentz-/Fano-like profile and the population distribution of the relaxed collective free electrons during relaxation. To be more specific, the fast relaxation process of these collective free electrons contributes to the PL shifting characteristics of both Lorentz-like and Fano-like emission profiles. We believed that our results provide a general solid foundation and guidance for analyzing and manipulating the physical processes of the PL emission from various plasmonic nanostructures.

Paper Details

Date Published: 3 November 2016
PDF: 1 pages
Proc. SPIE 9925, Nanoimaging and Nanospectroscopy IV, 99250D (3 November 2016); doi: 10.1117/12.2239311
Show Author Affiliations
Tingting Yin, Nanyang Technological Univ. (Singapore)
Liyong Jiang, Nanyang Technological Univ. (Singapore)
Ze Xiang Shen, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 9925:
Nanoimaging and Nanospectroscopy IV
Prabhat Verma; Alexander Egner, Editor(s)

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