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arXiv · 1501.02993

Subwavelength line imaging using plasmonic waveguides

Nina Podoliak·Peter Horak·Jord C. Prangsma·Pepijn W. H. Pinkse
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Abstract

We investigate the subwavelength imaging capacity of a two-dimensional fanned-out plasmonic waveguide array, formed by air channels surrounded by gold metal layers for operation at near-infrared wavelengths, via finite element simulations. High resolution is achieved on one side of the device by tapering down the channel width while simultaneously maintaining propagation losses of a few dB. On the other, low-resolution side, output couplers are designed to optimize coupling to free space and to minimize channel cross talk via surface plasmons. Point sources separated by λ/15 can still be clearly distinguished. Moreover, up two 90% of the power of a point dipole is coupled to the device. Applications are high-resolution linear detector arrays and, by operating the device in reverse, high-resolution optical writing.

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Nina Podoliak, Peter Horak, Jord C. Prangsma, Pepijn W. H. Pinkse. 2015-01-13. Subwavelength line imaging using plasmonic waveguides. https://doi.org/10.1109/jqe.2014.2385153

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