Tailoring silver nanorod arrays for subwavelength imaging of arbitrary coherent sources

The arrays of silver nanorods are known as prospective structures for near-field transmission. However, the available geometries are operating with incoherent sources and do not properly image the coherent ones. In this Brief Report it is demonstrated how the geometry proposed by Ono et al. [Phys. Rev. Lett. 95, 267407 (2005)] can be modified to enable subwavelength imaging of arbitrary coherent sources. The greatly improved performance of the device is demonstrated numerically both through analysis of transmission and reflection coefficients and by full-wave simulation of a particular source imaging.