Abstract
Nanocomposites based on transparent polymer matrices containing nanoparticles (NPs) of noble metals are modern-day materials that can be specially designed for photonics, linear and nonlinear optics, laser physics and sensing applications. We present the improved photosensitive nanocomposites doped with Au and Ag NPs allowing fabrication of high effective submicrometer dimensional diffraction structures using holographic method. A general approach for the fabrication of holographic structures using a two-component mixture of the monomers of different reactivity was developed. Two different methods, ex situ and in situ, were studied to introduce Au and Ag NPs in the polymer matrix. The diffusion model of the grating formation upon holographic exposure as well as the process of Ag NP synthesis in a polymer matrix is considered. The influence of the NP size on the polymerization process, material dynamic range and nonlinear properties were investigated. The mechanisms and characteristics of the nanocomposite nonlinear optical response are discussed.
Highlights
The nanocomposites based on optically transparent organic matrices with introduced noble metal nanoparticles (NPs) are one of the active areas of research in optics and optoelectronics.Their unique optical and electronic properties are mainly associated with the effects of dimensional quantization and dielectric restriction, as well as the excitation of local surface plasmons in metalNPs [1,2,3,4]
Tomlinson firstly proposed a general approach for the creation of photopolymerizable composites for holographic recording of phase volume periodic structures [26]
We have considered three cases: (i) Polymer of ethoxylated bisphenol A diacrylate (EBPDA) is fully localized in the illuminated areas of the recording layer, the Au NPs are localized in the dark areas (Figure 5b); (ii) the modulation of EBPDA concentration is the same as in a composite without NPs, the Au NPs are localized in the dark areas (Figure 5c); (iii) only the Au NPs participate in the diffusion mass-transfer and they are localized in the dark areas (Figure 5d)
Summary
The nanocomposites based on optically transparent organic matrices with introduced noble metal nanoparticles (NPs) are one of the active areas of research in optics and optoelectronics.Their unique optical and electronic properties are mainly associated with the effects of dimensional quantization and dielectric restriction, as well as the excitation of local surface plasmons in metalNPs [1,2,3,4]. The nanocomposites based on optically transparent organic matrices with introduced noble metal nanoparticles (NPs) are one of the active areas of research in optics and optoelectronics. Their unique optical and electronic properties are mainly associated with the effects of dimensional quantization and dielectric restriction, as well as the excitation of local surface plasmons in metal. The polymer matrices have a number of advantages compared with glasses. The linear and nonlinear optical properties of nanocomposites containing metal NPs are determined by the excitation of local surface plasmons in NPs, i.e., collective oscillations of the conduction electrons. By changing the shape, size and concentration of NPs, as well as the dielectric constant of the matrix, one can control the optical
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