| We have measured two-dimensional photoelectron momentum spectra of rare gas atoms and small molecules generated by 800-nm, 100-fs laser pulses and succeeded in identifying the spectral ridge region (BRR) which marks the location of the returning electrons that have been backscattered at their maximum kinetic energies. We demonstrate that the structural information, in particular, the differential elastic scattering cross sections of the target ion by free electrons, can be accurately extracted from the intensity distributions of photoelectrons on the ridges, thus effecting a first step toward laser-induced self-imaging of the target, with unprecedented spatial and temporal resolutions. |
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