2002/01/09 by Stefano Longhi, S. Longhi, P. Laporta +4
Computer Science · Engineering · Physics and Astronomy · #Condensed matter physics #Context (archaeology) #Optics #Photonic and Optical Devices #Physics #Quantum Information and Cryptography #Quantum mechanics #Quantum optics and atomic interactions #Quantum tunnelling #Rectangular potential barrier #Superluminal motion #physics.class-ph #physics.optics #quant-ph
paper · pdf · doi:10.1103/physreve.65.046610
published as Physical Review E65 (2002) 046610 · LaTeX file (8 pages), plus 5 figures
arxiv created 2002/01/09 · openalex publication_date 2002/04/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Tunneling of optical pulses at 1.5 microm 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.