  Electromagnetic response of PT-dipole is studied both analytically and
numerically. In analytical approach, dipole is represented by two point
scatterers. Within the first Born approximation, the asymmetry of the
scattering field with respect to the orientation of dipole is proven. In
numerical simulations, dipole is represented by two infinitely long, parallel
cylinders with opposite sign of imaginary part of refractive index. Numerical
data confirm the validity of the Born approximation in the weak scattering
limit, while significant deviations from the Born approximation were observed
for stronger scatterers and in the near-field range.
