From the post "High Frequency EMW From Laser" dated 31 Jul 2015 and "It's All Fluorescence Outside, Inside" dated 29 Jul 2015, the cone provides the asymmetry that differentiate between a counter clockwise rotating particle generating a E field outwards and a clockwise rotating particle generating a E field inwards. This asymmetry is lost when θ→90o,
Both clockwise and anti-clockwise rotations generate a E field parallel to PO. This radiation is distinct from EMW and photons. Neither,
B=i∂E∂x
nor
B=−i∂E∂x
is applicable. And occurs in a single burst as vcir≈0 is swapped as vshm on emission and the particle stopped oscillating, from the post "It's All Fluorescence Outside, Inside" dated 29 Jul 2015.
This is a short burst of E field towards O.