Macroscopic effects in noncollinear high-order harmonic generation.
We study two-color high-order harmonic generation using an intense driving field and its weak second harmonic, crossed under a small angle in the focus. Employing sum- and difference-frequency generation processes, such a noncollinear scheme can be used to measure and control macroscopic phase matching effects by utilizing a geometrical phase mismatch component, which depends on the noncollinear angle. We further show how spatial phase effects in the generation volume are mapped out into the far field allowing a direct analogy with temporal carrier envelope effects in attosecond pulse generation.
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
C M
CM
Heyl
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
P
P
Rudawski
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
F
F
Brizuela
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
S N
SN
Bengtsson
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
J
J
Mauritsson
Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden.
A
A
L'Huillier