Carrier-envelope phase control electron transport in an asymmetric double quantum dot irradiated by a few-cycle pulse
Carrier-envelope phase control electron transport in an asymmetric double quantum dot irradiated by a few-cycle pulse
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几个周期脉冲照射的不对称双量子点中的载流子包络相控制电子传输
DOI:
10.1016/j.optcom.2014.04.066
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发表时间:
2014-10
影响因子:
2.4
通讯作者:
Lee Ray-Kuang
中科院分区:
文献类型:
--
作者:
Yang Wen-Xing;Chen Ai-Xi;Guo Hao;Bai Yanfeng;Lee Ray-Kuang
We propose a theoretical scheme to coherently control the transport of a single electron in an asymmetric double-quantum-dot system. The single-electron transport originates from the intrinsic interplay between the externally applied few-cycle pulse and the inter-dot tunneling. Solving the equations of motion for dot-density matrix, we reveal numerically that the current exhibits a significant dependence on the carrier-envelope phase (CEP) of the few-cycle pulse, which is similar to the magnetic flux controlled coherent transport in an Aharnov–Bohm (AB) interferometer. As a result, by varying the CEP of the pulse one can suppress or enhance the current either instantaneously or periodically. Our results illustrate the potential to utilize few-cycle pulses for excitation in quantum dot systems through the CEP control, as well as a guidance in the design for possible experimental implementations.
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