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Register a new userSurface plasmons at single nanoholes in Au-films
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Added by
Vitalii Vlasko-Vlasov K.
Publication date
2004
fields
Physics
and research's language is
English
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The generation of surface plasmon polaritons (SPPs) at isolated nanoholes in 100 nm thick Au films is studied using near-field scanning optical microscopy (NSOM). Finite-difference time-domain calculations, some explicitly including a model of the NSOM tip, are used to interpret the results. We find the holes act as point-like sources of SPPs and demonstrate that interference between SPPs and a directly transmitted wave allows for determination of the wavelength, phase, and decay length of the SPP. The near-field intensity patterns can be manipulated by varying the angle and polarization of the incident beam.
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