  Unidirectional (chiral) emission of light from a circular dipole emitter into
a waveguide is only possible at points of perfect circular polarisation (C
points), with elliptical polarisations yielding a lower directional contrast.
However, there is no need to restrict engineered systems to circular dipoles
and with an appropriate choice of dipole unidirectional emission is possible
for any elliptical polarization. Using elliptical dipoles, rather than
circular, typically increases the size of the area suitable for chiral
interactions (in an exemplary mode by a factor $\sim 30$), while simultaneously
increasing coupling efficiencies. We propose illustrative schemes to engineer
the necessary elliptical transitions in both atomic systems and quantum dots.
