Figure 5.

(A) SEM images from 16 mm² areas fabricated using azimuthal (a–c), radial (d–f) and linear (g–i) polarization fabricated at v = 2 mm/s (Neff_line = 31), and φ = 0.37 J/cm². All pictures show top-views, except (c), (f) and (i) that present 45-degrees views. Images (b), (d) and (h) are higher magnifications of the red-dashed-square areas. (B) SEM images of area scans produced by radially (a–d) and azimuthally (e–h) polarized CV beams of a constant fluence, φ = 0.37 J/cm², at different scanning speeds. The corresponding 2D-FFT images for the lower and the higher scanning speed are shown, together with the respective 2D-FFT line profiles. The characteristic period of the ripple-like structures are also presented; (C) Structural coloration exhibited by a large area pattern, depicting the FORTH logo, fabricated with a azimuthally polarized CV beam of φ = 0.36 J/cm² at v = 1 mm/s (Neff_line = 30).