3D representation of the VCSOA near-field intensity distribution, after [58]. The holding beam is always on, and all parameters are kept constant in the sequence (a)–(g). (a) The writing beam (WB) is off; (b) the WB induces the appearance of a single CS; (c) the WB is off again, and the CS remains; (d) the WB is displaced in position, and switched-on again and generates a second CS; (e) the WB is off again and the two bright spots coexist; (f) the WB targets the second CS, but the relative phase of WB with respect to HB has been changed, and the CS is erased; (g) the WB targets the first CS, and it is erased in the same manner as in (f). Once the WB is blocked, the intensity distribution is identical to (a). In (h) is shown the CS profile.
