| Surface plasmon polaritons (SPPs) and the optical properties of metal nanostructure has arised a new branch in Optoelectronics. One of the most important character of surface plasmon resonance (SPR) is the tremendous enhancement of the electromagnetic near-fields in the vicinity of the metal nanoparticles (NPs), which can manipulate the electromagnetic waves at nanoscale. It has attracted a lot of attention due to its potential applications in optoelectronic detector, fluorescence enhancement, bio-\chemical-sensing, integrated optical devices, solar cells, and surface enhanced raman scattering (SERS).It is meaningful to develop simply controllable methods to increase the thermal stability of metal NPs embedded in transparent solid matrix, and research on the optical properties for their practical applications. In this work, a systematic study of the optical properties of the silver-doped soda-lime glass with the preparation of ion exchange technology was carried out. And then, we designed a planar multi-structure to couple with the fluorescent molecule R6G and silver-doped glass, which was acted as the energy donor. The primary significant results are listed as follows:(1) Silver ions could be introduced into soda lime glass with Ag+-Na+ ion exchange technology. According to the classic nuclear theory, the formation of the silver nanoparticles in the subsequent thermal annealing were caused by the local concentration fluctuations of the diffusion as well as the aggregation of silver atoms.(2) It’s hard to form silver NPs at 450℃-annealing with lower concentration of Ag+(C1=2.8%) under the ion exchange. The new born nanoclusters will be oxidized and decomposed into elements due to its high activity at long time annealing. While at higher concentration (C2=5.3%), it’s convenient to manipulate the dimension and density of silver NPs by controlling the annealing temperature and duration.(3) The photoluminescence (PL) properties of ion-exchanged glass can be elevated through annealing procedure. The origin of the PL is mainly from multi-facts as follows:(i) The absorption enhancement of the molecule-like multi-species of silver, such as Ag+, [Ag2+]、[Ag+2], [Ag3+], and[Ag32+].(ii) The resonant energy transfer among the multi-species of silver. (ⅲ) At higher silver concentration, due to the enhancement of near-field of silver NPs. the PL intensity of ion-exchanged samples was increasing with the growth of silver NP. When the size and concentration of silver NPs surpassed a certain value, the quenching of luminescence was found. The energy was transferred from luminescence centers to metal, and then dissipated as heat.(4) We provided a simply optical method of combining with optical spectra to characterize the structure and composition evolution of silver-exchanged glasses during the postannealing. It’s confirmed that the variety of PL during the annealing is primary from the transformation of the molecule-like multi-species of silver. However the effect of near-field of SPR can not be ignored.(5) We have designed a hybrid planar system consisting of silver-doped soda lime glass and fluorescent molecules R6G. With the excitation at 325nm laser, a maximum enhancement of 7 fold of emission of R6G was found. The increase of fluorescence intensity was in aspects as follows:(ⅰ) Near-field effect of surface plasmon resonance of silver NPs.(ⅱ) Radiative resonance energy transfer from multi-species of silver to R6G.(ⅲ) Background scattering of ion-exchanged glass, which was due to the alter of refraction induced by silver NPs. |
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