Cricchio Dario, Fiordilino Emilio
Dipartimento di Fisica e Chimica, Università di Palermo Via Archirafi 36 90123 Palermo Italy
RSC Adv. 2018 Jan 17;8(7):3493-3498. doi: 10.1039/c7ra11528h. eCollection 2018 Jan 16.
We study the effect of the carrier-envelope-phase (CEP) on the high harmonic generation (HHG) from a quantum ring driven by two short orthogonal lasers polarized along the and axes. In particular, by varying only the phase of the laser polarized along it is possible to control the intensity of the emitted harmonics. In fact, we show that the system can efficiently emit harmonics if the laser polarized along is small and that the cut-off of the spectra can be controlled by changing the phase or the intensity ratio between the two lasers. The wavelet analysis of the emitted harmonics and the time dependence of the angular momentum and of the energy acquired by the electron show that the electron has several main angular momentum variations that generate the cut-off harmonics in as many pulses. These results may have a significant technological impact in computer technology to store information. The implementation of a logical gate that exploits the different temporal locations of the pulses is discussed.
我们研究了载波包络相位（CEP）对由沿x和y轴偏振的两个短正交激光驱动的量子环产生高次谐波（HHG）的影响。特别地，仅通过改变沿x轴偏振的激光的相位，就有可能控制发射谐波的强度。事实上，我们表明，如果沿x轴偏振的激光较小，系统可以有效地发射谐波，并且通过改变两个激光之间的相位或强度比可以控制光谱的截止。对发射谐波的小波分析以及电子获得的角动量和能量的时间依赖性表明，电子有几个主要的角动量变化，这些变化在多个脉冲中产生截止谐波。这些结果可能在计算机技术中的信息存储方面产生重大的技术影响。文中还讨论了利用脉冲不同时间位置的逻辑门的实现。
