Abstract

Recently a coherent optical process called plasmon-injection ($\mathrm{\Pi }$) scheme, which employs an auxiliary source, has been introduced as a new technique to compensate losses in metamaterials. Here, a physical implementation of the $\mathrm{\Pi }$ scheme is proposed for enhanced superlens imaging in the presence of absorption losses and noise. The auxiliary source is constructed by a high-intensity illumination (above $1\mathrm{mW}/{\mathrm{\mu m}}^2$) 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 $\mathrm{\Pi }$ scheme as a strong candidate for loss compensation in near-field imaging systems without requiring nonlinear effects or gain media.

© 2018 Optical Society of America

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