Artículos de revistas
Measurement of superluminal optical tunneling times in double-barrier photonic band gaps
Registro en:
Physical Review E. Amer Physical Soc, v. 65, n. 4, 2002.
1539-3755
WOS:000175146600044
10.1103/PhysRevE.65.046610
Autor
Longhi, S
Laporta, P
Belmonte, M
Recami, E
Institución
Resumen
Tunneling of optical pulses at 1.5 mum 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. 65 4 2B