Generation of Broadband High Harmonics through Linear Mode Conversion in Inhomogeneous Plasmas |
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| Authors: | XU Hui SHENG Zheng-Ming ZHENG Jun XIA Yun-Jie |
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| Affiliation: | Shandong Provincial Key Laboratory of Laser Polarization andInformation Technology, Department of Physics, Qufu Normal University,Qufu 273165Department of Physics, Shanghai Jiaotong University, Shanghai 200240Beijing National Laboratory for Condensed Matters, Institute ofPhysics, Chinese Academy of Sciences, Beijing 100080 |
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| Abstract: | The generation of high order harmonics from an inhomogeneous ovderdense plasma target irradiated by an ultrashort intense laser pulse is studied by numerical simulation. During such interaction, ultrafast electron bunches are generated and excite electron plasma oscillations as they pass through the overdense target. These plasma oscillations will emit high-frequency electromagnetic emission by linear mode conversion. Instead of the integer harmonics generation, the emission appears with a broadband and even continuous spectrum corresponding to the electron plasma frequency range of the inhomogeneous plasma density. |
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| Keywords: | 52 25 Os 52 38 Kd 52" target="_blank">')"> 52 35 Ra |
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