Measurement of Superluminal optical tunneling times in double-barrier photonic bandgaps

Details Measurement of Superluminal optical tunneling times in double-barrier photonic bandgaps Measurement of Superluminal optical tunneling times in double-barrier photonic bandgaps

2002-01-09

arxiv.org/abs/physics/0201013v1

Physical Review E65 (2002) 046610

Physics

Optics

LaTeX file (8 pages), plus 5 figures

Scientific paper

10.1103/PhysRevE.65.046610

Tunneling of optical pulses at 1.5 micron wavelength through double-barrier periodic fiber Bragg gratings is experimentally investigated. Tunneling time measurements as a function of barrier distance show that, far from the resonances of the structure, the transit time is paradoxically short, implying Superluminal propagation, and almost independent of the distance between the barriers. These results are in agreement with theoretical predictions based on phase time analysis and also provide an experimental evidence, in the optical context, of the analogous phenomenon expected in Quantum Mechanics for non-resonant superluminal tunneling of particles across two successive potential barriers. [Attention is called, in particular, to our last Figure]. PACS nos.: 42.50.Wm, 03.65.Xp, 42.70.Qs, 03.50.De, 03.65.-w, 73.40.Gk

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