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Resonant Transmission of Microwaves through a Narrow Metallic Slit
Sambles, J. Roy
University of Exeter
Physical Review Letters
American Physical Society
Strong resonant transmission of microwave radiation through a very narrow (much less than the radiation wavelength) metallic slit is recorded. The results show that a set of resonant self-coupled surface plasmons are excited within the small gap, giving a Fabry-Pérot-like behavior in accord with analytical results published earlier [Y. Takakura, Phys. Rev. Lett. 86, 5601 (2001)]. The metallic slit, formed by two thick metal plates spaced apart by tens of microns, is inserted in a wavelength-sized aperture. On resonance the transmissivity through the metal slit is more than 2 orders of magnitude greater than the radiation impinging on the slit area.
Fuzi Yang, and J. Roy Sambles, Physical Review Letters, Vol. 89, article 063901 (2002). "Copyright © 2002 by the American Physical Society."
89 (6), article 063901