High-harmonic spectroscopy is a promising candidate for imaging electronic structures and dynamics in condensed matter by all-optical means and with unprecedented temporal resolution. We investigate harmonic spectra from finite, hexagonal nanoribbons, such as graphene and hexagonal boron nitride, in armchair and zig-zag configuration. The symmetry of the system explains the existence and intensity of the emitted harmonics.

中文翻译：

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来自实空间时间相关薛定谔计算的六边形纳米带的高谐波光谱

高谐波光谱是通过全光学手段和前所未有的时间分辨率对凝聚态物质中的电子结构和动力学进行成像的有希望的候选者。我们研究了扶手椅和锯齿形结构中有限六边形纳米带（例如石墨烯和六边形氮化硼）的谐波光谱。系统的对称性解释了发射谐波的存在和强度。