Fig. 9: SEM images of nanostructures on an optical fiber with a height/depth of 270 nm.
From: Electron beam lithography on nonplanar and irregular surfaces

a 2D grating array with a line width of 167 nm; b dot array with a diameter of 200 nm; c crossbar array with a line width of 167 nm; and d star line pattern19. Reproduced with permission from ACS Publications (2014)