标题： 波导中通过多模拍频实现的谐波生成的准相位匹配 显示英文标题

标题： Quasi-phasematching of harmonic generation via multimode beating in waveguides

摘要： 提出了一种新的气体准相位匹配高次谐波产生（HHG）方案。在此方案中，利用波导中激发多种模式所导致的轴向强度的快速变化来实现准相位匹配。数值模拟表明，与单一相干长度下获得的信号相比，谐波信号增强了 >10^4 倍。 显示英文摘要

摘要： A new scheme for quasi-phasematching high harmonic generation (HHG) in gases is proposed. In this, the rapid variation of the axial intensity resulting from excitation of more than one mode of a waveguide is used to achieve quasi phasematching. Numerical modeling demonstrates enhancement of the harmonic signal over that achieved for a single coherence length by factors >10^4.