Remarkable Zeroth-Order Resonant Transmission of Microwaves through a Single Subwavelength Metal Slit
Suckling, James R.
Sambles, J. Roy
Lawrence, Christopher R.
University of Exeter; QinetiQ Ltd, Farnborough
Physical Review Letters
American Physical Society
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.
James R. Suckling, J. Roy Sambles, and Christopher R. Lawrence, Physical Review Letters, Vol. 95, article 187407 (2005). "Copyright © 2005 by the American Physical Society."
95 (18), article 187407