标题： 脉冲高次谐波辐射来自非相互作用金属中受激布洛赫振荡 显示英文标题

标题： Pulsed high harmonic generation of light due to pumped Bloch oscillations in noninteracting metals

摘要： 我们推导出一个简单的理论，用于非相互作用金属在大振幅振荡电场泵浦下产生高阶谐波。 该模型假设辐射光场来源于由于泵浦产生的时变电流导致的电子加速，同时也假设系统具有恒定的光激发载流子密度，因此忽略了带间偶极激发（这会在半导体中产生载流子）。 我们研究了在何种情况下奇数次谐波频率会在辐射光谱中占主导地位，并且还将该模型应用于ZnO等实际材料，这些材料在实验中已经展示了高阶谐波生成。 显示英文摘要

摘要： We derive a simple theory for high-order harmonic generation due to pumping a noninteracting metal with a large amplitude oscillating electric field. The model assumes that the radiated light field arises from the acceleration of electrons due to the time-varying current generated by the pump, and also assumes that the system has a constant density of photoexcited carriers, hence it ignores the dipole excitation between bands (which would create carriers in semiconductors). We examine the circumstances under which odd harmonic frequencies would be expected to dominate the spectrum of radiated light, and we also apply the model to real materials like ZnO, for which high-order harmonic generation has already been demonstrated in experiments.