2010
DOI: 10.1103/physrevb.82.115315
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Instability of dynamic localization in the intense terahertz-driven semiconductor Wannier-Stark ladder due to the dynamic Fano resonance

Abstract: The lifetime of an electronic Floquet state in a semiconductor Wannier-Stark ladder (WSL) driven by an intense monochromatic THz wave is examined based on the R-matrix Floquet theory, in which an excess density of state (DOS) corresponding to the lifetime is calculated. It is revealed that the dynamic localization (DL) characteristic of this system is unstable against Fano resonance (FR)-like inter-miniband decay mechanism caused by THz-mediated ac-Zener tunneling; in this study, this is termed as dynamic F… Show more

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Cited by 11 publications
(32 citation statements)
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“…2 and 3 of Ref. 19. A similar tendency also applies for [1/m] μν (z), though its effect is considered weaker than that of V μν (z) because of the small difference of the masses in the barrier and well regions of the SL potential.…”
Section: A Basic Frameworkmentioning
confidence: 71%
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“…2 and 3 of Ref. 19. A similar tendency also applies for [1/m] μν (z), though its effect is considered weaker than that of V μν (z) because of the small difference of the masses in the barrier and well regions of the SL potential.…”
Section: A Basic Frameworkmentioning
confidence: 71%
“…[15][16][17] Strictly speaking, the DWSL problem should be dealt with as a problem with open boundary conditions, namely, the scattering problem. 18,19 The reason for this is obviously understood by making the Kramers-Henneberger transformation 20,21 of the original tilted-SL-potential flapping temporally with a laser frequency into a photodressed potential, as will be shown later in more detail. 22 This intersite ac-ZT effect is reminiscent of the dc-ZT effect in WSL, where the WSL levels attributed to different SL minibands are coupled to each other, leading to delocalization of electronic states across several WSL sites; in particular, such delocalization stands out when Zener resonance takes place.…”
mentioning
confidence: 99%
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