![Patterns in the polarization plane](images/Fig_DOE_3d.jpg)
Two-arm electron matter-wave vortices detected in the polarization plane produced by a pair of time-delayed, oppositely circularly-polarized attosecond pulses.
![Marcel (front) and Tony (back)](images/Photo_Marcel_Tony.jpg)
Back: Anthony F. Starace, Georges Holmes Professor of Physics.
![Patterns in the propagation plane](images/Fig_ZX_3d.jpg)
Electron momentum distribution detected in the propagation plane produced by a pair of time-delayed, oppositely circularly-polarized attosecond pulses.