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VOLUME 85 (2007) | ISSUE 3 | PAGE 188
Optical echo in photonic crystals
PACS: 42.15.Eq, 42.25.Dd, 42.70.Qs
Abstract
The dynamics of photonic wavepacket in the effective oscillator potential is studied. The oscillator potential is constructed on a base of one dimensional photonic crystal with a period of unit cell adiabatically varied in space. The structure has a locally equidistant discrete spectrum. This leads to an echo effect, i.e. the periodical reconstruction of the packet shape. The effect can be observed in a nonlinear response of the system. Numerical estimations for porous-silicon based structures are presented for femtosecond Ti:Sapphire laser pump.