The Floquet state structure modulated by the interminiband interactions in the dynamic Wannier‐Stark ladder driven by a periodic pulse train is theoretically investigated by calculating photoabsorption spectra. The novel coherent control is found that the interminiband interactions are completely removed by tuning the employed laser appropriately. Further, unexpected negative absorption is exhibited in the spectra for other laser parameters.

Topics
Superlattices, Photoabsorption, Coherent control
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© 2007 American Institute of Physics.
2007
American Institute of Physics
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