A conventional optical superlens for imaging beyond the diffraction limit produces images only in the near-field zone of the superlens. In contrast, an optical far-field superlens (FSL) device has a remarkable transmission property that leads to a one-to-one relationship between the far-field and the near-field angular spectra. This property makes the device suitable for imaging beyond the diffraction limit from far-field measurement. This specific FSL is composed of a properly designed periodically corrugated metallic slab-based superlens. Through the numerical design and parameter study, we show that the transmission property of this FSL is based on a specific strong-broadband wavenumber excitation of surface-plasmon polaritons supported by the nanostructured metallic grating.
© 2006 Optical Society of America
Original Manuscript: July 22, 2005
Revised Manuscript: November 7, 2005
Manuscript Accepted: November 21, 2005
Stéphane Durant, Zhaowei Liu, Jennifer M. Steele, and Xiang Zhang, "Theory of the transmission properties of an optical far-field superlens for imaging beyond the diffraction limit," J. Opt. Soc. Am. B 23, 2383-2392 (2006)