Phys. Rev. E 65, 046610 (2002) [6 pages]Measurement of superluminal optical tunneling times in double-barrier photonic band gapsReceived 23 October 2001; published 2 April 2002 Tunneling of optical pulses at 1.5 μm wavelength through double-barrier periodic fiber Bragg gratings is experimentally investigated in this paper. Tunneling time measurements as a function of the barrier distance show that, far from resonances of the structure, the transit time is paradoxically short—implying superluminal propagation—and almost independent of the barrier distance. This result is in agreement with theoretical predictions based on phase-time analysis and provides, in the optical context, an experimental evidence of the analogous phenomenon in quantum mechanics of nonresonant superluminal tunneling of particles across two successive potential barriers. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevE.65.046610
DOI:
10.1103/PhysRevE.65.046610
PACS:
42.50.-p, 03.65.Xp, 42.70.Qs
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