TY - JOUR T1 - Enhancement in Above-Threshold Ionization Spectrum AU - Ge , Guanghan AU - Song , Xiaohong AU - Chen , Jing AU - Yang , Weifeng JO - Journal of Atomic and Molecular Sciences VL - 1 SP - 41 EP - 45 PY - 2017 DA - 2017/08 SN - 8 DO - http://doi.org/10.4208/jams.050317.061617a UR - https://global-sci.org/intro/article_detail/jams/10435.html KW - -- AB -

Freeman resonance and resonance-like enhancement (RLE) in above-threshold ionization (ATI) spectrum are reviewed in this work. Two different interpretations accounting for the high-energy enhancements in the ATI spectra are described. One of them is the multiphoton ionization “channel closing” relating to the destructive ⁄ constructive interference, while the other pursue the fundamental concept of resonance and associates the enhancement with a resonant excited state. Primary calculation of the RLE using generalized quantum trajectory Monte Carlo method is also present.