Theory of Transmission and Dissipation of Radiation near a Metallic Slab Based on Angular Spectrum Representation

Tetsuya INOUE
Yasuo OHDAIRA
Hirokazu HORI

Publication
IEICE TRANSACTIONS on Electronics   Vol.E88-C    No.9    pp.1836-1844
Publication Date: 2005/09/01
Online ISSN: 
DOI: 10.1093/ietele/e88-c.9.1836
Print ISSN: 0916-8516
Type of Manuscript: Special Section PAPER (Special Section on Nanophotonics and Related Techniques)
Category: 
Keyword: 
optical near-field,  angular spectrum representation,  surface plasmon polariton,  excitation tunneling,  dipole radiation,  

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Summary: 
The radiation properties of oscillating electric dipoles are studied theoretically for three and four layered systems including a single metallic slab based on angular spectrum representation of vector spherical waves. One of the remarkable results obtained is the transmission energy spectrum showing strong dependence on the thickness of a dielectric layer placed between oscillating electric dipole and metallic surface, which explains the experimental results of molecular fluorescence into surface plasmon modes. The theory based on angular spectrum representation and tunneling current provides us with a clear identification of plasmonic excitation transfer, transmission loss associated with plasmon transport in metallic layer, and energy dissipation or quenching of excitation due to surface plasmon excitation at the metallic surface in relation to the characteristic complex wave number of evanescent waves.