Observation of negative velocity pulse propagation

Bernard Ségard (1) , Bruno Macke (1)

1 PhLAM - Laboratoire de Physique des Lasers, Atomes et Molécules - UMR 8523

The propagation of suitably shaped millimetre wave pulses through a linear resonant molecular absorber is studied in order to give an experimental support to the concept of negative group velocity. Significant pulse advances with negligible distortion are actually observed with a true shape detection.

Domaines: Optique [physics.optics]

Bernard Ségard, Bruno Macke. Observation of negative velocity pulse propagation. Physics Letters A, 1985, 109 (5), pp.213-216. ⟨10.1016/0375-9601(85)90305-6⟩. ⟨hal-00879786⟩