Polarization revival of a Bloch-oscillating wave packet in conjunction with resonant Zener tunneling

Article

关键词: SEMICONDUCTOR SUPERLATTICES;    INDUCED DELOCALIZATION;    STARK LOCALIZATION;    ELECTRIC-FIELD;    QUANTUM-WELLS;    STATES;   

DOI  :  10.1103/PhysRevB.65.113302

来源: SCIE

【 摘 要 】

We investigate the dynamics of a Bloch-oscillating wave packet in the presence of strong coupling to delocalized above barrier states (Zener tunneling), using time-resolved intraband polarization-sensitive measurements. At a threshold electric field, the resonance of localized and delocalized states causes a quantum beating which is observed as a revival in the intraband polarization. Our numerical simulation visualizes the spatial wave packet decomposition and reformation. The wave packet moves on a ps time scale over a distance of more than 100 nm and sequentially undergoes Bloch oscillations in the below- and above-barrier bands.

【 授权许可】

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