Probing the ladder spectrum arising from motion in a 2-D lattice driven by the in-plane constant force

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dc.creatorYan, W.
dc.creatorClaro, F.
dc.creatorZeng, Z. Y.
dc.creatorZhao, Y. L.
dc.creatorLiang, J. Q.
dc.date2001-05-29
dc.date2001-06-01
dc.date.accessioned2026-07-07T02:41:35Z
dc.date.available2026-07-07T02:41:35Z
dc.descriptionThe coherent interband dynamics of optically excited two-dimensional lateral surface superlattices driven by an in-plane static electric field has been investigated. The linear absorption, the spectrally-resolved pump-probe four-wave mixing signals and spatial coherent wavepacket evolution in the time-domain are obtained. When the rational condition $E_x/E_y=p/q$, with $p,q$ prime to each other, is fullfilled, it is found that $p$ peaks appear within the frequency interval $ω_{Bx}=eE_xa/\hbar$ in both linear absorption and degenerate four-wave mixing signals. The coherent time evolution of the electron-hole pair wavepacket is that of a breathing mode, with the period $2πp/ω_{Bx}$, These findings are consistent with the recent spectral results (Phys. Rev. Lett. {\bf 86}, 3116), hence providing a method for probing the coherent dynamics of quantum particles in 2D lattices.
dc.description12 pages, 4 Postscript figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0105567
dc.identifierhttp://arxiv.org/abs/cond-mat/0105567
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/17800
dc.subjectMesoscale and Nanoscale Physics
dc.subjectMaterials Science
dc.titleProbing the ladder spectrum arising from motion in a 2-D lattice driven by the in-plane constant force
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