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Modern Physics 2024
双色涡旋场驱动下高次谐波光子通道特性研究
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Abstract:
本文研究了双色涡旋场驱动下高次谐波产生的光子通道特性。通过引入具有轨道角动量的涡旋光，利用光子通道和轨道角动量的一一对应关系，可以实现光子通道的区分。另外，研究发现，改变双色场中控制场和基频场的强度比，能够调控不同光子通道的谐波效率，获得具有特定轨道角动量的高次谐波，这为轨道角动量可控的极紫外涡旋阿秒脉冲的产生提供了基础。
In this paper, the characteristics of the photon channels during the high harmonic generation process driven by the two-color vortex field are investigated. By introducing the vortex beam with orbital angular momentum (OAM), the photon channels can be effectively identified due to the fact that there is a one-to-one correspondence between the photon channels and OAMs. Besides, it is found that the harmonic efficiencies of different photon channels can be tuned by adjusting the intensity ratio between the control field and the fundamental frequency field in the two-color field, and high harmonics can be generated with specific OAMs. These findings lay the foundation for the generation of extreme ultraviolet vortexing attosecond vortices with controllable OAMs.
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