Abstract

When a molecule is excited with a broadband light source, multiple electronic states can be excited coherently to create an electron wavepacket (EWP). Investigating EWP in a molecule is one of the essential steps to understand electron transfer or charge transfer processes during chemical reactions [1,2]. So far, the molecular EWP is proposed to be monitored by recording photoelectron spectrum or high harmonic spectrum. In the present work, we proposed a more flexible method to observe attosecond molecular EWP and we observed an attosecond EWP in a nitrogen molecule by nonlinear Fourier transform spectroscopy [3] by measuring the delay-dependent kinetic energy spectrum of fragment N⁺ ions generated from attosecond-pump and attosecond-probe pulses.

© 2015 IEEE