Delay in light transmission through small apertures

A. Dogariu, T. Thio, L. J. Wang, T. W. Ebbesen, H. J. Lezec

Research output: Contribution to journalArticlepeer-review

68 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)450-452
Number of pages3
JournalOptics Letters
Issue number7
StatePublished - Apr 1 2001
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics


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