LSM image obtained by measuring the intensity of laser beam reflected from the surface of sample 1: image of a sample area (a) and zoom into of sample area (b). In this sample the antidots (with a diameter of measured via LSM) are spaced by within the rows. The angle between the directions of antidot rows and bias current is . The bright and dark regions correspond to the photoresponse obtained from the sample covered by Au film and the substrate, respectively.
LSM images obtained at temperature by measuring the voltage response of sample 1 over the area of . The critical current of the sample is . Images are taken at (a) and (b).
LSM images obtained at temperature by measuring voltage response of sample 2 over the area of . The sample critical current is . Images are taken at (a) and (b). The dashed ellipsoid in (a) marks a position where two antidots of one row are connected via a bright line with one antidot of an adjacent row.
(a) Amplitude of the voltage response induced by the focused laser beam as a function of the bias current in sample 1 at . The red (1) and blue (2) curves are measured at two different positions of laser beam shown in picture (b). The red curve (1) is measured between the rows of antidots and the blue curve (2) is taken within the row.
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