TY - JOUR AU - Ran Reiff AU - Joel Venzke AU - Agnieszka Jaron-Becker AU - Andreas Becker AB - We have performed macroscopic calculations for the thin medium or low gas density regime and a central gas jet using microscopic numerical solutions of the time-dependent Schrödinger equation. In the case of a spatial phase distribution for broadband Gaussian pulses with a negative Porras factor, our theoretical results show an interference pattern in the angular distribution of below- and near-threshold harmonics, which is not present for the monochromatic Gouy phase distribution. The interference pattern is due to off-center contributions that are in-phase with those at the central points in the focus. The location of the maxima in the interference pattern can be estimated using the well-known double-slit formula with an effective slit separation. BT - OSA Continuum DA - 2021-07 DO - 10.1364/osac.424788 IS - 7 N2 - We have performed macroscopic calculations for the thin medium or low gas density regime and a central gas jet using microscopic numerical solutions of the time-dependent Schrödinger equation. In the case of a spatial phase distribution for broadband Gaussian pulses with a negative Porras factor, our theoretical results show an interference pattern in the angular distribution of below- and near-threshold harmonics, which is not present for the monochromatic Gouy phase distribution. The interference pattern is due to off-center contributions that are in-phase with those at the central points in the focus. The location of the maxima in the interference pattern can be estimated using the well-known double-slit formula with an effective slit separation. PB - The Optical Society PY - 2021 EP - 1897 T2 - OSA Continuum TI - Interference effects in harmonic generation induced by focal phase distribution UR - https://www.osapublishing.org/osac/fulltext.cfm?uri=osac-4-7-1897&id=452068 VL - 4 SN - 2578-7519 ER -