Abstract

A prism-shape microlens constructed with two-dimensional nanoscale metal waveguide arrays (MWGAs) is introduced for near-field subwavelength imaging. Finite-difference time-domain numerical simulations reveal that the microlens shows interesting object distance-independent subwavelength imaging as the object distance ranges from $100\mathrm{nm}\text{to}1000\mathrm{nm}$ and the concave angle of the prism-shape lens is less than 150°. The possibility of using such microlens for array microimaging is also demonstrated. The microlens may provide potential applications in nanophotonics, lithography, and superresolution imaging.

© 2008 Optical Society of America

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