研究目的
To review recent relativistic High Harmonic Generation (HHG) and Above Threshold Ionization (ATI) in intense laser fields via the Klein-Gordon equation with ponderomotive approach, and discuss relativistic effects at higher intensities within the strong field approximation (SFA).
研究成果
The review highlights significant differences between relativistic and non-relativistic harmonic spectra in intense laser pulses, noting a shift in the cut-off point to lower values in the relativistic regime. This has considerable implications for the production of high-order harmonics in photon energies approaching the keV region and for attosecond pulse production.
研究不足
The study primarily focuses on theoretical and computational methods, with limited discussion on experimental validation. The relativistic effects are discussed within the context of high-intensity laser fields, which may not cover all possible scenarios in practical applications.
