Amplifying Sommerfeld precursors and producing a discontinuous index of refraction with gains and losses

Filipe J. Ribeiro and Marvin L. Cohen
Phys. Rev. E 64, 046602 – Published 19 September 2001
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Abstract

We show that for specially designed linear dispersive media with one absorption line and one gain line the Sommerfeld precursors of a pulse can be amplified leading to an earlier detection of the signal. Also, we show that in some systems with one strong absorption line, a carefully placed gain resonance must induce a discontinuity in the imaginary part of the frequency dependent index of refraction and in the first derivative of its real part.

  • Received 9 April 2001

DOI:https://doi.org/10.1103/PhysRevE.64.046602

©2001 American Physical Society

Authors & Affiliations

Filipe J. Ribeiro and Marvin L. Cohen

  • Department of Physics, University of California, Berkeley, California 94720
  • Materials Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720

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Vol. 64, Iss. 4 — October 2001

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