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A plasmonic perfect absorber is modeled, and its absorption/reflection properties are investigated in the visible frequency regime using finite-difference time-domain numerical simulation to show how refractive index can be measured accurately using dual interrogation technique (wavelength and intensity interrogations). Very high absorption (>95 %) is observed in the spectral range below 625 nm...
A tapered optical fiber fabricated by a simple chemical etching method and modified with Ag nanoparticles (AgNPs) by chemical deposition was evaluated for surface-enhanced Raman scattering (SERS). The fiber probe was used for SERS measurements in both direct and remote scattering modes, yielding desired performance in both scattering configurations. The state of the obtained AgNPs made a significant...
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