On the basis of real-time ab initio calculations, we study the nonperturbative interaction of two-color laser pulses with $\mathrm{Mg}\mathrm{O}$ crystal in the strong-field regime to generate isolated attosecond pulses from high-harmonic emissions from $\mathrm{Mg}\mathrm{O}$ crystal. In this regard, we examine the impact of the characteristics of the incident pules, such as its shape, intensity, and ellipticity, as well as the consequences of the crystal anisotropy on the emitted harmonics and their corresponding isolated attosecond pulses. Our calculations predict the creation of isolated attosecond pulses with a duration of approximately 300 as; in addition, using elliptical driving pulses, we show the generation of elliptical isolated attosecond pulses. Our work prepares the path for all-solid-state compact optical devices offering perspectives beyond traditional isolated attosecond pulses emitted from atoms.

中文翻译：

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MgO的高次谐波和孤立的阿秒脉冲

在实时从头算的基础上，我们研究了双色激光脉冲与$镁\mathrm{Ø}$ 晶体在强场状态下从高谐波发射产生孤立的阿秒脉冲 $镁\mathrm{Ø}$水晶。在这方面，我们检查了入射钉子的特性（例如其形状，强度和椭圆率）的影响，以及晶体各向异性对所发射谐波和其相应的孤立阿秒脉冲的影响。我们的计算预测了大约300 as持续时间的孤立阿秒脉冲的产生；此外，使用椭圆形驱动脉冲，我们展示了椭圆形孤立的阿秒脉冲的产生。我们的工作为全固态紧凑型光学设备铺平了道路，提供了超越原子发射的传统孤立阿秒脉冲的视角。