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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 16, Iss. 26 — Dec. 22, 2008
  • pp: 21256–21270

High-frequency response of subwavelength-structured metals in the petahertz domain

J. Weiner and Frederico D. Nunes  »View Author Affiliations

Optics Express, Vol. 16, Issue 26, pp. 21256-21270 (2008)

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Electromagnetic plane waves, incident on and reflecting from a dielectric-conductor interface, set up a standing wave in the dielectric with the B-field adjacent to the conductor. It is shown here how the harmonic time variation of this B-field induces an E-field and a conduction current J c within the skin depth of a real metal; and that at frequencies in the visible and near-infrared range, the imaginary term σ i of the complex conductivity ̃σ=σ r +iσ i dominates the optical response. Continuity conditions of the E-field through the surface together with the in-quadrature response of the conductivity determine the phase relation between the incident E-M field and J c . If slits or grooves are milled into the metal surface, a displacement current in the dielectric gap and oscillating charge dipoles at the structure edges are established in quadrature phase with incident field. These dipoles radiate into the aperture and launch surface waves from the edges. They are the principle source of light transmission through the apertures.

© 2008 Optical Society of America

OCIS Codes
(240.5420) Optics at surfaces : Polaritons
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Optics at Surfaces

Original Manuscript: October 27, 2008
Revised Manuscript: December 3, 2008
Manuscript Accepted: December 3, 2008
Published: December 9, 2008

J. Weiner and Frederico D. Nunes, "High-frequency response of subwavelength-structured metals in the petahertz domain," Opt. Express 16, 21256-21270 (2008)

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