Issue 15, 2016

Giant and broadband circular asymmetric transmission based on two cascading polarization conversion cavities

Abstract

In this paper, a three-layered sandwiched metamaterial is proposed to achieve giant and broadband asymmetric transmission of circularly polarized waves at the near-infrared communication band. The metamaterial consists of two layers of identical 45° tilted chiral S-shaped metasurfaces sandwiched with a subwavelength metallic grating. Based on the delicate combination of broadband polarization conversion and a cavity-enhanced effect, the asymmetric parameter can reach a maximum value of 0.87 and over 0.6 in a wide range from 1.2 to 2.0 μm, which has not been found in previous reports. Furthermore, a perfect robustness to misalignments is obtained as the effect originated from function-independent cascading cavities, which effectively reduce the requirement of alignment precision in layer-by-layer photolithography processes. The proposed nanostructure has a great potential to be used as a circular polarization rotator or diode-like device in optical communication systems.

Graphical abstract: Giant and broadband circular asymmetric transmission based on two cascading polarization conversion cavities

Supplementary files

Article information

Article type
Paper
Submitted
06 Jan 2016
Accepted
17 Mar 2016
First published
31 Mar 2016

Nanoscale, 2016,8, 8189-8194

Giant and broadband circular asymmetric transmission based on two cascading polarization conversion cavities

R. Ji, S. Wang, X. Liu and W. Lu, Nanoscale, 2016, 8, 8189 DOI: 10.1039/C6NR00058D

To request permission to reproduce material from this article, please go to the Copyright Clearance Center request page.

If you are an author contributing to an RSC publication, you do not need to request permission provided correct acknowledgement is given.

If you are the author of this article, you do not need to request permission to reproduce figures and diagrams provided correct acknowledgement is given. If you want to reproduce the whole article in a third-party publication (excluding your thesis/dissertation for which permission is not required) please go to the Copyright Clearance Center request page.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements