Paper
26 September 2011 Broadband, tunable super-lenses in the visible region of the electromagnetic spectrum with metallodielectric stacks (MDS)
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Abstract
We compare two designs of metallodielectric stacks (MDS) based on Ag/GaP and Au/GaP, and calculate their superresolving bandwidths. The super-resolving bandwidth of the Ag/GaP design is (520nm-560nm), while that of Au/GaP is (630nm-660nm). We evaluate these two designs in their ability to resolve two 20nm wide apertures separated by a center-to-center distance of 80nm. We also compare two numerical techniques used to study these systems, namely the transfer matrix method (TMM) and the finite element method (FEM). The TMM is simpler than more numerically demanding FEM technique but FEM is more robust for determining super-resolution in most cases. Finally we discuss the practical limitations of our super-resolving imaging devices in resolving objects that are much smaller than the incident wavelength.
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Nkorni Katte, Jian Gao, Andrew Sarangan, Joseph Haus, Michael Scalora, and Rachel Jakubiak "Broadband, tunable super-lenses in the visible region of the electromagnetic spectrum with metallodielectric stacks (MDS)", Proc. SPIE 8096, Plasmonics: Metallic Nanostructures and Their Optical Properties IX, 80963E (26 September 2011); https://doi.org/10.1117/12.894164
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KEYWORDS
Finite element methods

Super resolution

Dielectrics

Metals

Silver

Diffraction

Gaussian beams

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