Removal of interminiband interactions in dynamic Wannier-Stark ladder by means of a pulse train with periodic repetition |
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Authors: | Ken-ichi Hino Nobuyuki Toshima |
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Institution: | Graduate School of Pure and Applied Sciences, Institute of Materials Science, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8573, Japan |
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Abstract: | A quasienergy structure of a dynamic Wannier-Stark ladder (DWSL) that is driven by a pulse train with periodic repetition is analyzed. Here, novel properties on coherent control realized by means of tuning a combination of laser parameters are revealed. In particular, we report a striking property that interminiband interactions due to both static and dynamic Zener tunnelings are completely removed from the DWSL by utilizing the periodic pulse train with either square or full-cycle saw-toothed unit-pulse-shape in a temporal domain, regardless of magnitude of Dc- and Ac-electric fields exerted on the original superlattices. |
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Keywords: | 78 67 Pt |
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