  We conducted three-dimensional hydrodynamical simulations to study the
interaction of two late opposite jets with the ejecta of a core collapse
supernova (CCSN), and study the bipolar structure that results from this
interaction as the jets inflate hot-low-density bubbles. The newly born central
object, a neutron star (NS; or a black hole), launches these jets at about 50
to 100 days after explosion. The bubbles cross the photosphere in the polar
directions at much earlier times than the regions at the same radii near the
equatorial plane. The hot bubbles releases more radiation and the photosphere
recedes more rapidly in the tenuous bubble. Our results strengthen earlier
claims that were based on toy models that such an interaction might lead to a
late peak in the light curve, and that an equatorial observer might see a rapid
drop in the light curve. Our results might have implications to much earlier
jets that explode the star, either jets that the newly born NS launches in a
CCSN, or jets that a NS companion that merges with the core of a massive star
launches in a common envelope jets supernova (CEJSN) event. Our results add
indirect support to the CEJSN scenario for fast blue optical transients, e.g.,
AT2018cow, ZTF18abvkwla, and CSS161010.
