9 March 2018 Thermally generated metals for plasmonic coloring and surface-enhanced Raman sensing
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Spectral coloring glass and its application on the surface-enhanced Raman scattering are demonstrated experimentally via a simple and moderate heat-treating of the top ultrathin gold film to create discrete nanoparticles, which can produce localized surface plasmon resonances and strong plasmonic near-field coupling effects. Ultrathin metal films with a wide range of thicknesses are investigated by different heat-treatment processes. The annealed metal films have been demonstrated with a series of spectral coloring responses. Moreover, the microscopy images of the metal film structures confirm the formation of distinct geometry features in these operation procedures. Densely packed nanoparticles are observed for the ultrathin metal film with the single-digit level of thickness. With increasing the film thickness over 10 nm, metallic clusters and porous morphologies can be obtained. Importantly, the metallic resonators can provide enhanced Raman scattering with the detection limit down to 10  −  7  molL  −  1 of Rhodamine 6G molecules due to the excitation of plasmon resonances and strong near-field coupling effects. These features hold great potential for large-scale and low-cost production of colored glass and Raman substrate.
© 2018 Society of Photo-Optical Instrumentation Engineers (SPIE)
Zhenping Huang, Zhenping Huang, Jian Chen, Jian Chen, Guiqiang Liu, Guiqiang Liu, Yan Wang, Yan Wang, Yi Liu, Yi Liu, Li Tang, Li Tang, Zhengqi Liu, Zhengqi Liu, } "Thermally generated metals for plasmonic coloring and surface-enhanced Raman sensing," Optical Engineering 57(3), 037103 (9 March 2018). https://doi.org/10.1117/1.OE.57.3.037103 . Submission: Received: 20 November 2017; Accepted: 30 January 2018
Received: 20 November 2017; Accepted: 30 January 2018; Published: 9 March 2018

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