DOI: 10.1051/jp1:1994160
J. Phys. I France 4 (1994) 565-570
Photonic tunneling times
G. Nimtz, A. Enders and H. SpiekerII.Physikalisches Institut, Universit5,t zu K51n, Zülpicher Str. 77, D-50937 KSln, Germany
(Received 9 December 1993, accepted 17 December 1993)
Abstract
We report on resonant and non-resonant photonic tunneling experiments.
Resonant tunneling of wave packets has revealed a light localization,
whereas the non-resonant barrier tunneling has corresponded to a
zero-time barrier crossing. For a frequency-limited signal the
non-resonant tunneling transmission time yielded superluminal group
velocities, whereas in the case of a resonant transition the velocities
are much slower than c.
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