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VOLUME 65 (1997) | ISSUE 5 | PAGE 380
Non envelope formulation for femtosecond optical pulses in semiconductors
We analyze the response of the ensemble of l*-excitons driven by a femtosecond optical pulse beyond traditional approach of the slowly varying amplitudes. For optical pulses of a given duration it is shown that the off-resonance optical field can evolve into a stable soli ton with non-zero asymptotics. PACS: 02.30Jr, 42.50.Md} 42.65.Tg, 71.36.-hc