In this tutorial we discuss the macroscopic aspects of the extreme nonlinear frequency
conversion process of high-order harmonic generation. For most, this entails describing the …

Symmetries and their associated selection rules are extremely useful in many fields of
science. For systems of electromagnetic (EM) fields interacting with matter, the symmetries of …

We demonstrate experimentally a relatively simple yet powerful all-optical enhancement and
control technique for high harmonic generation. This is achieved by using as a pump beam …

We investigate phase-matched harmonic generation of ultrashort (picosecond) laser pulses,
tuned in the vicinity of a five-photon resonance in argon, confined in a hollow-core optical …

We propose a simple quasi-phase-matching (QPM) scheme in high-order harmonic
generation (HHG) based on the approximately linear dependence of the phase mismatch on …

摘要在高次谐波产生过程中, 相位匹配是提高其产生效率的必备技术. 传统相位匹配技术在各向
同性的气体介质中无法实现, 而准相位匹配技术作为一种可行的替代方案 …

摘要对比优化与未优化的三色光组合发现, 当高次谐波场在波导管内传播时,
仅当单原子响应中始终保持单个发射峰, 或者在合适相位匹配条件下单原子响应中的多余发射峰 …

I will present (i) a theory describing the microscopic-macroscopic dynamical symmetries of
electromagnetic fields, revealing new symmetries and selection rules in light-matter …

In the present work the frequency up-conversion of (ps) laser pulses towards the EUV
spectral regime was investigated. We addressed the problem of limited conversion efficiency …

Providing efficient nonlinear optical frequency conversion is essential for numerous
applications. Fundamentally, dispersion limits the efficiency of such processes through …