  We calculate the cross section for optical absorption of planar 2D Majorana
nanowires. Light is described in the dipole approximation. We discuss the
signatures on the cross section of a near-zero-energy mode. A low energy peak
for transverse polarization, absent in longitudinal one, reveals the presence
of the Majorana-like state. This peak is relatively robust against thermal
smearing of the level occupations. We consider the influence of optical masks
hiding parts of the nanowire from the light.
