Metallic superlens designed with close-to-cutoff of long-range SPP mode

Guillaume Tremblay; Yunlong Sheng

doi:10.1117/12.870337

17 November 2010 Metallic superlens designed with close-to-cutoff of long-range SPP mode

Guillaume Tremblay, Yunlong Sheng

Proceedings Volume 7848, Holography, Diffractive Optics, and Applications IV; 78480G (2010) https://doi.org/10.1117/12.870337
Event: Photonics Asia 2010, 2010, Beijing, China

Abstract

The metallic superlens of a single negative permittivity is easier to implement than the double negative material superlens and can be applied to nano-scale resolution lithography. The metallic superlens amplifies by the resonance the surface plasmon polariton (SPP) waves, which carry the sub-wavelength detail information of the object. However, the excitations of the long- and the short-range SPP modes of the metal slab lead to two peaks in the transfer function which enhance the spatial frequencies disproportionally, resulting in strong sidelobes in the image. Conventionally the metallic superlens is designed by trials without rules to follow. We propose to design the metallic superlens by approaching the cutoff condition of the long-range SPP mode in order to flatten the transfer function and to improve the imaging performance significantly. Design experiments of Al and Ag superlens with both the transfer-matrix approach and the numerical Finite Difference in Time Domain method are shown.

Citation Download Citation

Guillaume Tremblay and Yunlong Sheng "Metallic superlens designed with close-to-cutoff of long-range SPP mode", Proc. SPIE 7848, Holography, Diffractive Optics, and Applications IV, 78480G (17 November 2010); https://doi.org/10.1117/12.870337

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