Attosecond pulse trains, crucial for ultrafast science, traditionally consist of only odd harmonics due to symmetry constraints in high-order harmonic generation. Here, the authors extend the RABBIT technique to analyze non-consecutive harmonics, enabling the temporal reconstruction of attosecond pulse trains and advancing metrology in extreme ultraviolet spectroscopy.
- Praveen Kumar Maroju
- Miguel Benito de Lama
- Giuseppe Sansone
