Temporal structure of attosecond pulses from laser-driven coherent synchrotron emission

Abstract

The microscopic dynamics of laser-driven coherent synchrotron emission transmitted through thin foils are investigated using particle-in-cell simulations. For normal incidence interactions, we identify the formation of two distinct electron nanobunches from which emission takes place each half-cycle of the driving laser pulse. These emissions are separated temporally by 130 attoseconds and are dominant in different frequency ranges, which is a direct consequence of the distinct characteristics of each electron nanobunch. This may be exploited through spectral filtering to isolate these emissions, generating electromagnetic pulses of duration ~70 as.

References in corpus (2)

• Theory of high harmonic generation in relativistic laser interaction with overdense plasma
• Enhanced relativistic harmonics by electron nanobunching

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• Single 100-terawatt attosecond X-ray light pulse generation