论文标题
旋转周期系统的固体样高谐波生成
Solid-like high harmonic generation from rotationally periodic systems
论文作者
论文摘要
实体理论理解了强激光场晶体的高谐波产生（HHG），该理论基于转化不变的周期性边界条件（PBC）。对于具有旋转不变的PBC的系统，可以开发和应用类似的Bloch定理。从理论上讲，我们以Cyclo [18]碳为代表性的环型簇为代表，并通过求解时间依赖性的liouville-von neumann方程来研究其HHG。在循环极化激光器的辐照下，观察到左手和右手谐波的明确选择规则，而在线性极化激光场中，Cyclo [18]碳表现出固体的HHG，构成了固体的HHG，源自频段内的振荡和频段间过渡，这反过来既可以构成对称性和几声，又是构造的构成。从某种意义上说，这项工作提出了连接的连接，该连接连接了气体和固体的高谐波。
High harmonic generation (HHG) from crystals in strong laser fields has been understood by the band theory of solid, which is based on the periodic boundary condition (PBC) of translational invariant. For systems having PBC of rotational invariant, in principles an analogous Bloch theorem can be developed and applied. Taking a ring-type cluster of cyclo[18]carbon as a representative, we theoretically suggest a quasi-band model and study its HHG by solving time-dependent Liouville-von Neumann equation. Under the irradiation of circularly polarized laser, explicit selection rules for left-handed and right-handed harmonics are observed, while in linearly polarized laser field, cyclo[18]carbon exhibits solid-like HHG originated from intra-band oscillations and inter-band transitions, which in turn is promising to optically detect the symmetry and geometry of controversial structures. In a sense, this work presents a connection linking the high harmonics of gases and solids.
