Remarkable Zeroth-Order Resonant Transmission of Microwaves through a Single Subwavelength Metal Slit

J. R. Suckling, J. R. Sambles, and C. R. Lawrence
Phys. Rev. Lett. 95, 187407 – Published 28 October 2005

Abstract

A slit in a thick metal plate that is extremely subwavelength will not transmit microwaves polarized parallel to it. It is shown here that cuts perpendicular to the slit allow parallel polarized radiation to resonantly transmit. Furthermore, a zero-order mode may be excited within the slit, the frequency of which, to first order, is independent of the plate depth. Remarkably, for this novel type of resonance, the field in the slit oscillates with a constant phase and little amplitude variation throughout the plate depth, while the resonant wavelength tends to infinity as the slit width approaches zero.

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  • Received 15 February 2005

DOI:https://doi.org/10.1103/PhysRevLett.95.187407

©2005 American Physical Society

Authors & Affiliations

J. R. Suckling and J. R. Sambles

  • School of Physics, Exeter University, Devon, EX4 4QL, United Kingdom

C. R. Lawrence

  • QinetiQ, Cody Technology Park, Farnborough, GU14 0LX, United Kingdom

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Issue

Vol. 95, Iss. 18 — 28 October 2005

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