Plasmonic Core-Multishell Nanowires for Optical Applications
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Abstract
LEDs are very useful in today’s society, especially when compared to conventional incandescent and fluorescent lamps. According to the US Department of Energy, by 2027 the use of LEDs could save 348 TWh of electricity, which is the equivalent annual electrical output of 44 large electric power plants and a total savings of more than $30 billion at today’s electricity prices. The goal of our tool is to improve the efficiency and color rendering of white LEDs. This can be done by implementing novel nanostructure devices called core-multishell nanowires, which has greater surface area and absorption efficiency when compared to typical phosphors used in white LEDs. This greater surface area gives the structure a larger cross-section, which allows it to emit stronger and absorb more efficiently. The core-multishell nanowire will be used as phosphors for the white LEDs to improve its optical properties. They are modeled as cylinders with infinite length and with the incident light perpendicular to its axis, so a handful of computational methods were carried out to obtain its properties. The properties that the tool calculates are the LDOS (Local Density of States) and Purcell factor of a single nanowire. I am currently working on a code which will also predict the wavelength and dipole position of the specific nanowire. Users will be able to find out which materials and dimensions give the greatest efficiency for use as phosphors in white LEDs.
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