Extending the Propagation Distance of a Silver Nanowire Plasmonic Waveguide with a Dielectric Multilayer Substrate

Chemical synthesized silver nanowires have been proved to be the efficient architecture for Plasmonic waveguides, but the high propagation loss prevents their widely applications. Here, we demonstrate that the propagation distance of the plasmons along the Ag NW can be extended if the Ag NW was placed on a dielectric multilayer substrate containing a photonic band gap, but not placed on a commonly used glass substrate. The propagation distance at 630 nm wavelength can reach 16 um even that the Ag NW is as thin as 90 nm in diameter. Experimental and simulation results further show that the polarization of this propagating plasmon mode was nearly parallel to the surface of the dielectric multilayer, so it was excited by a transverse-electric polarized Bloch surface wave propagating along a polymer nanowire with diameter at only about 170 nm on the same dielectric multilayer. Numerical simulations were also carried out and consistent with the experiment results. Our work provides a platform to extend the propagation distance of plasmonic waveguide and also for the integration between photonic and plasmonic waveguides on the nanometre scale.Comment: 5 pages, 4 figure

Diffraction-Free Bloch Surface Waves

In this letter, we demonstrate a novel diffraction-free Bloch surface wave (DF-BSW) sustained on all-dielectric multilayers that does not diffract after being passed through three obstacles or across a single mode fiber. It can propagate in a straight line for distances longer than 110 {\mu}m at a wavelength of 633 nm and could be applied as an in-plane optical virtual probe, both in air and in an aqueous environment. The ability to be used in water, its long diffraction-free distance, and its tolerance to multiple obstacles make this DF-BSW ideal for certain applications in areas such as the biological sciences, where many measurements are made on glass surfaces or for which an aqueous environment is required, and for high-speed interconnections between chips, where low loss is necessary. Specifically, the DF-BSW on the dielectric multilayer can be used to develop novel flow cytometry that is based on the surface wave, but not the free space beam, to detect the surface-bound targets

Single planar photonic chip with tailored angular transmission for multiple-order analog spatial differentiator

The authors present a planar photonic chip, which operate as a multiple-order analog spatial differentiator. It provides a route for designing fast, power-efficient, compact and low-cost devices used in edge detection and optical image processing, thus expanding the functions of standard microscopes

Source data for "Single planar photonic chip with tailored angular transmission for multiple-order analog spatial differentiator"

 This Source Data file provides the corresponding simulated and experimental data files for the figures in the main text of the paper "  Single planar photonic chip with tailored angular transmission for multiple-order analog spatial differentiator", including the data within Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 and Fig. 6. </p

A planar metallic collimator based on controlling surface plasmons&apos;s phase

Abstract We present numerical study of the optical transmission of a metal film perforated by slits array with different spacing. A planar metallic collimator with phase retardation controlled by the slits space is designed. The analysis results show this structure with appropriate space between the slits can collimate or deflect the transmitted beam, which is attributed to phase retardation of surface plasmons propagating from one slit to the other. The numerical analysis results demonstrate a useful deflecting or collimating function of a planar metallic film in the applied fields of optical storage, optical coupler, nano-optics