2017/10/01 by Soniya Juneja, Juneja, Soniya, Manmohan Singh Shishodia +1
Engineering · Materials Science · Physics and Astronomy · #FOS: Physical sciences #Gold and Silver Nanoparticles Synthesis and Applications #Optics (physics.optics) #Orbital Angular Momentum in Optics #Plasmonic and Surface Plasmon Research
paper · pdf · doi:10.48550/arxiv.1710.00382
openalex publication_date 2017/10/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
It is now well established that, due to excitation of localized surface\nplasmon resonances in plasmonic nanosystems, the electric field from an\nexternal irradiation source is greatly amplified in their vicinity. Surface\nplasmon mediated electric field amplification near plasmonic nanosystems is of\nvital importance for; light absorption enhancement of solar cells, molecular\ndetection using surface enhanced Raman spectroscopy, proximity measurement of\nbiological macromolecules such as proteins, lipids and nucleic acids using\nplasmon enhanced FRET, cancer therapy using photothermal effects, just to name\nonly a few applications. Present work formulates Bergman-Milton multipole\nspectral expansion approach for investigating surface plasmon mediated electric\nfield amplification in the dimer arrangement of Al, Ag and Au nanoparticles. In\ncomparison to an isolated spherical shaped nanoparticle, their aggregate\nprovide greater field enhancement, wider spectral tuning, and multiple resonant\nfeatures. In view of the superior plasmonic characteristics of dimer\nconfiguration, a systematic investigation of electric field enhancement is done\nand their suitability for UV-Visible applications is assessed. The role of\nparticle size, embedding medium and interparticle separation in field\namplification and wavelength tuning is quantified. Moreover, plasmonic\nnanoparticle dimer designs for UV-Visible spectral window are presented.\n