Abstract
Twenty first century is the age of Information Technology and we always look for faster information transport and processing capabilities. Data can be moved by transistors and optical fibers. Transistors carry small amount of data and are small in size while optical fibers can carry huge amount of data but are much bigger in size. Metal nanostructures may possess right combination of electric and optical properties to tackle the issues outlined above and realized dream of significantly faster processing speeds. In this work, dispersion relation in Plasmon modes in linear chain and alternated chain of nanoparticles like silver-gold, and gold-copper were studied. Expressions of angular frequency of Plasmon modes, group- velocity and extinction- coefficient were derived by solving equation of motion of Plasmon oscillation on the single kind of nanoparticle and that on different alternated chain of nanoparticles. Expressions of angular frequency of Plasmon modes, group velocity and extinction coefficient were tested for specific linear chain of nanoparticles. Calculation showed that extinction coefficients for the linear chain of Copper, Gold and Silver nanoparticles are less and group velocities higher than that of alternated silver-gold and alternated gold-copper at their respective resonance frequenciesJournal of Institute of Science and TechnologyVolume 21, Issue 1, August 2016, Page: 133-139
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