Enhanced superlens imaging with loss-compensating hyperbolic near-field spatial filter

Abstract

Recently a coherent optical process called plasmon injection ($\Pi$) scheme, which employs an auxiliary source, has been introduced as a new technique to compensate losses in metamaterials. In this work, a physical implementation of the $\Pi$ scheme on a thin silver film is proposed for enhanced superlens imaging. The efficacy of the scheme is illustrated by enhancing near-field imaging deeper beyond the diffraction limit in the presence of absorption losses and noise. The auxiliary source is constructed by a high-intensity illumination of the superlens integrated with a near-field spatial filter. The integrated system enables reconstruction of an object previously unresolvable with the superlens alone. This work elevates the viability of the $\Pi$ scheme as a strong candidate for loss compensation in near-field imaging systems without requiring non-linear effects or gain medium.

arXiv comment5 pages, 5 figures

References in corpus (6)

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Cited by in corpus (5)

• Hyperbolic metamaterial as a tunable near-field spatial filter for the implementation of the active plasmon injection loss compensation scheme
• Far-field subwavelength resolution imaging by spatial spectrum sampling
• Theory of coherent active convolved illumination for superresolution enhancement
• Spin-governed topological surfaces and broken spin-momentum locking in a gyromagnetic medium
• Experimental realization of the active convolved illumination imaging technique for enhanced signal-to-noise ratio