研究目的
The objective of this work is to further reveal the potential of this enabling technology by experimentally demonstrating the efficient generation of a 2D guided wave Bessel-type beam obtained with a meta-axicon lens formed by a 2D array of plasmonic nanoresonators integrated on top of a silicon-on-insulator (SOI) waveguide.
研究成果
An experimental demonstration of an integrated plasmonic axicon operating in a guided wave configuration and allowing the generation of Bessel-Gaussian intensity profile beams is reported. The long-distance diffraction free propagation obtained using such a metasurface-dielectric hybrid axicon lens demonstrates the ability to control the light flux in guided wave structures through local engineering of the effective index using plasmonic nanoresonators.
研究不足
The overall transmission of the axicon is evaluated at about 64%, which is practically the same as the best value of 68% transmission efficiency for a dielectric metasurface based free space propagation axicon. This means that for our design, there is still room for improvement in transmission efficiency by considering dielectric rather than metal nanoresonators.
