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Proceedings Paper

Analytic calculation for scattering of electromagnetic waves by linear slot array
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Paper Abstract

For the scattering of an incident plane electromagnetic wave by a slotted metallic film, the previous analytical calculation for a single slot is generalized into a model for an arbitrary linear array of slots with variable slot width, slot separation and slot dielectric material. The advantage as well as the effectiveness of the generalized model presented in this work are best described by enabling calculation of a continuous spatial distribution of an electromagnetic field by inverting a small discrete coefficient matrix spanned by both the slot index and the sloteigenmode index for a set of linear equations. In comparisons with well-known plane-wave and finite-difference time-domain methods, inverting a large matrix, in wave number space for the former case and in real space at each time step for the latter case, can be avoided to greatly speed up numerical calculations. In addition, based on a partial-domain method, the formalism presented here can be employed to treat a composite surface (e.g., a slotted metal film with different dielectric materials in the slots).

Paper Details

Date Published: 20 January 2012
PDF: 11 pages
Proc. SPIE 8268, Quantum Sensing and Nanophotonic Devices IX, 826804 (20 January 2012); doi: 10.1117/12.913014
Show Author Affiliations
Danhong Huang, Air Force Research Lab. (United States)
David Wellems, Air Force Research Lab. (United States)


Published in SPIE Proceedings Vol. 8268:
Quantum Sensing and Nanophotonic Devices IX
Manijeh Razeghi; Eric Tournie; Gail J. Brown, Editor(s)

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