Philip H. Jones, Onofrio M. Maragò & Giovanni Volpe
Fig. 4.2 — Electromagnetic waves
(a) Monochromatic electromagnetic wave linearly polarised along the x-direction and propagating towards the positive z-direction. (b) Left and (c) right circularly polarised waves featuring positive and negative helicity, respectively. For clarity, in (b) and (c), only the electric field is shown.