Double Blind Holography of Attosecond Pulses

Program Description

One of the main challenges in attosecond science is the temporal characterization of the XUV field. Current characterization methods are based on nonlinear light matter interactions and are limited in terms of the minimal required intensity, stability and waveform complexity. I will describe an experimental demonstration of a conceptually new linear and all-optical pulse characterization method, inspired by double blind holography. Holography is realized by measuring the XUV spectra of two unknown attosecond signals and their interference. Assuming a finite pulse duration constraint, we reconstruct the missing spectral phases and characterize the unknown signals for both single isolated pulses and pulse trains. This method can be readily extended to any interference based measurement scheme, including polarization measurement, two-sources and multi-orbital contributions, enabling the study of complex electron dynamics.