Transverse shift of a focal spot due to switching of the sign of circular polarization
Baranova N.B., Savchenko A.Yu., Zel'dovich B. Ya.
An axially symmetric optical lens made of isotropic material produces a transverse shift Ax oc σλ/2π of the focal spot "center of gravity" under the switch of circular polarisation sign σ ±1 of a plane incident wave (£* +ÍÇ£Õ) exp(tfcz). It may be done, if mostly upper (y > 0) half of^ the input plane is illuminated. This simple effect is discussed in a general context of the photon's spin-orbit interaction.