(color online) Optical fan-shaped hyperlens with radial layered structures. (a) Schematic of waveguide-integrated fan-shaped hyperlens, with inset showing hyperlens and blocking layer with two nano-slits that serve as object to be imaged. (b) SEM image of entire sample with hyperlens. On the left-hand is a grating coupler that is used as input port, and on the right-hand is the output port, which is an arc-shaped slit. The hyperlens is shown to be between the grating coupler and the curved slit. The capsule shaped protuberant ridge is excess gold that has expanded out of PMMA structure during electroplating. (c) Direct visualization at output port taken by using CCD camera. Panel on the right side shows profile of output beams. Reproduced with permission from Ref. [24].