20 April 2006 Plasmon waveguides on silver nanoelements
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Abstract
Interest in photonic nanodevices motivates search for efficient transport of energy in plasmon waveguides. Chains of silver nanoelements guide light in channels of below-the-diffraction-limit size due to surface plasmon coupling. We calculate attenuation factors in chains with several geometries of nanoplates using the Finite Difference Time Domain (FDTD) method for visible and near infrared range of wavelengths, where the Drude model of dispersion is valid. Nanoplates considered in simulations are 1 micrometer high, 50 nm thick and 380 nm long and are embedded in a medium with refractive index reaching n = 1.5. Advantages of proposed waveguides are connected with their small size and possible tuneability by adjustment of geometrical parameters. However, the waveguides highly attenuate signals due to radiation into the far field and internal damping. For the optimum considered geometry and 595 nm wavelength, the energy transmission of 2 micrometers long chain of parallel nanoplates reaches 39%.
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W. M. Saj, W. M. Saj, Tomasz J. Antosiewicz, Tomasz J. Antosiewicz, Jacek Pniewski, Jacek Pniewski, Tomasz Szoplik, Tomasz Szoplik, } "Plasmon waveguides on silver nanoelements", Proc. SPIE 6195, Nanophotonics, 61950Y (20 April 2006); doi: 10.1117/12.662932; https://doi.org/10.1117/12.662932
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