Fig. 2. Several electric fields used to excite a biphenyl (the real part of the complex field is displayed). The vector colors indicates the norm of the vectors. (a) Plane wave polarized along x and wavelength 210 nm (b) superposition of a left and right polarized plane wave (c) superposition of LCPL and RCPL with a slightly different amplitude (corresponding to Cohen's proposal5) (d) azimuthally polarised beam (λ = 210 nm, w 0 = 10λ) (e) superposition of two azimuthal beams propagating along z and x.
