Rydberg excitation of neutral nitric oxide molecules in strong UV and near-IR laser fields  

作　　者：吕航 张军峰 左万龙 徐海峰 金明星 丁大军 

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University [2]Jilin Provincial Key Laboratory of Applied Atomic and Molecular Spectroscopy(Jilin University)

出　　处：《Chinese Physics B》2015年第6期284-287,共4页中国物理B（英文版）

基　　金：Project supported by the National Basic Research Program of China(Grant No.2013CB922200);the National Natural Science Foundation of China(Grant Nos.11034003 and 11274140)

摘　　要：Rydberg state excitations of neutral nitric oxide molecules are studied in strong ultraviolet （UV） and near-infra-red （IR） laser fields using a linear time-of-flight （TOF） mass spectrometer with the pulsed electronic field ionization method. The yield of Rydberg molecules is measured as a function of laser intensity and ellipticity, and the results in UV laser fields are compared with those in near-IR laser fields. The present study provides the first experimental evidence of neutral Rydberg molecules surviving in a strong laser field. The results indicate that a rescattering-after-tunneling process is the main contribution to the formation of Rydberg molecules in strong near-IR laser fields, while multi-photon excitation may play an important role in the strong UV laser fields.Rydberg state excitations of neutral nitric oxide molecules are studied in strong ultraviolet （UV） and near-infra-red （IR） laser fields using a linear time-of-flight （TOF） mass spectrometer with the pulsed electronic field ionization method. The yield of Rydberg molecules is measured as a function of laser intensity and ellipticity, and the results in UV laser fields are compared with those in near-IR laser fields. The present study provides the first experimental evidence of neutral Rydberg molecules surviving in a strong laser field. The results indicate that a rescattering-after-tunneling process is the main contribution to the formation of Rydberg molecules in strong near-IR laser fields, while multi-photon excitation may play an important role in the strong UV laser fields.

关 键 词：strong laser fields neutral Rydberg excitation nitric oxide 

分 类 号：O561[理学—原子与分子物理]