Subwavelength line imaging using plasmonic waveguides
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 {\lambda}/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.
Cite
@article{arxiv.1501.02993,
title = {Subwavelength line imaging using plasmonic waveguides},
author = {Nina Podoliak and Peter Horak and Jord C. Prangsma and Pepijn W. H. Pinkse},
journal= {arXiv preprint arXiv:1501.02993},
year = {2015}
}