  We demonstrate a new four-wave mixing (4WM) geometry based on structured
light. By utilizing near-field diffraction through a narrow slit, the pump beam
is asymmetrically structured to modify the phase matching condition, generating
multi-mode output in both the spatial and frequency domains. We show that the
frequency parameter enables selection of various spatial-mode outputs,
including a twin-beam geometry which preserves relative intensity squeezing
shared between the two beams. The results suggest that the engineering of
atomic states via structured light may provide a pathway to a diverse set of
quantum resources based on multi-mode squeezed light.
