通过斯塔克位移的分子线中的鲁棒超快电流
Robust ultrafast currents in molecular wires through Stark shifts
摘要：
利用两种入射激光频率$ω$和$2ω$在分子导线中诱导超快电流的新方法。该机制依赖于斯塔克位移，而不是光子吸收，转移人口的激发态，并利用场的时间分布，以产生相位可控的传输。在一个\emph{trans} -聚乙炔低聚物耦合到金属铅的计算表明，该机制是高效和强大的超快电子退相过程引起的电子振动耦合。
英文摘要：
A novel way to induce ultrafast currents in molecular wires using two incident laser frequencies, $ω$ and $2ω$, is demonstrated. The mechanism relies on Stark shifts, instead of photon absorption, to transfer population to the excited states and exploits the temporal profile of the field to generate phase controllable transport. Calculations in a \emph{trans}-polyacetylene oligomer coupled to metallic leads indicate that the mechanism is highly efficient and robust to ultrafast electronic dephasing processes induced by vibronic couplings.
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