A research team of RIKEN center for Advanced Photonics and the University of Tokyo has developed a novel type of interferometer to resolve the fringes originating from both optical interference of attosecond pulses and quantum interference of electronic states in a matter. They have demonstrated the feasibility of their interferometer by post-generation splitting of high-order harmonic pulse with an experiment using a helium atom sample. They present their work in the journal Ultrafast Science.
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Source: Phys.org