Photoemission and ionization of He+ under simultaneous irradiation of fundamental laser and high-order harmonic pulses -: art. no. 043002
Photoemission and ionization of He+ under simultaneous irradiation of fundamental laser and high-order harmonic pulses -: art. no. 043002
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DOI：
10.1103/physrevlett.91.043002
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发表时间：
2003-07-25
影响因子：
8.6
通讯作者：
Ishikawa, K
中科院分区：
文献类型：
--
作者：
Ishikawa, K
本文从理论上研究了He ~+离子在强钛宝石激光及其27次或13次谐波脉冲作用下的响应。与单独的基波脉冲相比，来自He+的高次谐波发射增强了许多数量级。此外，虽然单独的10 fs激光器（波长λ（F）=800 nm）或其峰值强度分别为3 × 10（14）和10（13）W/cm（2）的27次谐波脉冲电离不超过5 × 10（-6）的He+，但它们的组合脉冲导致17%的令人惊讶的高He 2+产率。
We theoretically study the response of He+ exposed simultaneously to an intense Ti:sapphire laser and its 27th or 13th harmonic pulses. High-order harmonic emission from He+ is enhanced by many orders of magnitude compared with the case of the fundamental pulse alone. Moreover, while an individual 10 fs laser (wavelength lambda(F)=800 nm) or its 27th harmonic pulse with a peak intensity of 3x10(14) and 10(13) W/cm(2), respectively, ionizes no more than 5x10(-6) of He+, their combined pulse leads to a surprisingly high He2+ yield of 17%.