Coherent Single-Electron Transfer in Coupled Semiconductor Quantum Dots Driven by a Few-Cycle Pulse

杨文星; 陈爱喜; 白艳锋; 陆加伟

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理论物理通讯 ›› 2014, Vol. 62 ›› Issue (02) : 277-282.

Coherent Single-Electron Transfer in Coupled Semiconductor Quantum Dots Driven by a Few-Cycle Pulse

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Coherent Single-Electron Transfer in Coupled Semiconductor Quantum Dots Driven by a Few-Cycle Pulse

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摘要

We theoretically study the coherent transport of a single electron between the ground states of a double coupled quantum dot structure. The coherent transport is externally controlled by applying a few-cycle pulse with an adjustable carrier-envelope phase (CEP). By simulating numerically, it is shown that there exhibits a strong dependence of electron transport on the CEP and on the arrival time of few-cycle pulse. We provide a simple analytical description for this phenomenon by approximating the quantum dot structure as a three-level Λ-type system. These results also illustrate the potential of utilizing excitation in coupled quantum dots as a means of measuring the CEP of few-cycle pulses.

Abstract

导出引用

杨文星, 陈爱喜, 白艳锋, 等. Coherent Single-Electron Transfer in Coupled Semiconductor Quantum Dots Driven by a Few-Cycle Pulse[J]. 理论物理通讯, 2014, 62(02): 277-282

YANG Wen-Xing, CHEN Ai-Xi, BAI Yan-Feng, et al. Coherent Single-Electron Transfer in Coupled Semiconductor Quantum Dots Driven by a Few-Cycle Pulse[J]. Communications in Theoretical Physics, 2014, 62(02): 277-282

中图分类号： 42.65.Re 78.67.Hc

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基金

Supported in part by National Natural Science Foundation of China under Grant Nos. 11374050 and 61372102, by Qing Lan Project of Jiangsu, and the Fundamental Research Funds for the Central Universities under Grant No. 2242012R30011