Nanospheres on a GaAs Wafer
Studying the nanospheres layer on a GaAs wafer, we managed to find the lost Hokusai lithograph “Clouds Cast Shadows on the Mountains.” But even if we have deluded ourselves, lithography still has to do with it. A monolayer of dense-packed spheres serves as a mask in our nanolithography method. Sometimes the spheres pack into several layers, and a beautiful picture of thin-film interference opens before us. Leica DM4500 P microscope, St. Petersburg State University, Resource Center “Geomodel”. Details of the method could be found in O.A. Lozhkina et al., Nanodisk fabrication by nanosphere lithography, AIP Conf. Proc. 1748, 030003 (2016). O.A. Lozhkina fabricated the wafer coating, V.V. Shilovskikh made the photo, Yu.V. Kapitonov supervised the lithography project.
—Yury V. Kapitonov, St. Petersburg State University, Russia
