Elimination of the band gap of a resonant optical material by electromagnetically induced transparency Academic Article uri icon


  • We consider the possibility of wave propagation in the normally disallowed (band-gap) region of a resonant optical medium, that is, in the band of frequencies near resonance where the real part of the frequency-dependent dielectric function is negative. We demonstrate that wave propagation can become allowed by the application of a strong electromagnetic field resonant with some additional transition of the material system. The frequencies at which these effects can occur are strongly influenced by local-field effects. 1999 The American Physical Society.

published proceedings

  • Physical Review A

author list (cited authors)

  • Agarwal, G. S., & Boyd, R. W.

citation count

  • 20

complete list of authors

  • Agarwal, GS||Boyd, Robert W

publication date

  • October 1999