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Plasmonic Devices for Electromagnetic Wave Concentration

Jyotsna Chauhan, Ufera Khan

Abstract


The EOT effect is enhanced by the concentration of EM waves. We explored optical transmission through arrays of nanohole pairs and found that the EOT effect through subwavelength nanoholes is enhanced by the confinement of electric field, and that the transmission is substantially higher than predicted. The optical transmission capabilities of arrays of isolated nanohole pairs and bridging nanohole pairs in gold with various geometrical configurations were explored and investigated using conventional optical theory. Using numerical simulation methods, we made experimental observations of various geometric shapes and investigated their light transmission characteristics. The distance of the pair of nanoholes and the shape of the holes affected the transmission intensity and resonance wavelength. The shape of these nanohole pairs changes from a triangle to a circle to a square, resulting in increased transmission intensity and a shift in resonance wavelength to red. A pair of nanohole bridges that function as plasmon sensors have been studied Numerical simulation method shows same result as experimental observations.


Keywords


SERS, EOT, SP, PSTM, plasmon sensor, wavelength, nanoholes

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References


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