Phase matching of noncollinear sum and difference frequency high harmonic generation above and below the critical ionization level

1. Ellis, J.L.
2. Dorney, K.M.
3. Durfee, C.G.
4. Hernández-García, C.
5. Dollar, F.
6. Mancuso, C.A.
7. Fan, T.
8. Zusin, D.
9. Gentry, C.
10. Grychtol, P.
11. Kapteyn, H.C.
12. Murnane, M.M.
13. Hickstein, D.D.