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Optics Letters

Optics Letters


  • Vol. 26, Iss. 7 — Apr. 1, 2001
  • pp: 450–452

Delay in light transmission through small apertures

A. Dogariu, T. Thio, L. J. Wang, T. W. Ebbesen, and H. J. Lezec  »View Author Affiliations

Optics Letters, Vol. 26, Issue 7, pp. 450-452 (2001)

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We demonstrate a technique for measuring pulse propagation time delays with 0.5-fs resolution by use of a widely available 100-fs pulsed laser. Using this technique, we measured the time delay of a light pulse transiting through subwavelength apertures placed on a 0.3-μm metallic film. We measured a 7-fs total transit time, corresponding to an effective group velocity of c/7 . The experimental result yielded additional evidence that light interacts resonantly with oscillators formed by the surface modes near the small apertures.

© 2001 Optical Society of America

OCIS Codes
(050.1950) Diffraction and gratings : Diffraction gratings
(240.6680) Optics at surfaces : Surface plasmons
(260.5740) Physical optics : Resonance
(320.7100) Ultrafast optics : Ultrafast measurements

A. Dogariu, T. Thio, L. J. Wang, T. W. Ebbesen, and H. J. Lezec, "Delay in light transmission through small apertures," Opt. Lett. 26, 450-452 (2001)

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