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https://hdl.handle.net/2440/124774
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Type: | Journal article |
Title: | Ultra-wideband tri-layer transmissive linear polarization converter for terahertz waves |
Author: | Ako, R.T. Lee, W.S.L. Atakaramians, S. Bhaskaran, M. Sriram, S. Withayachumnankul, W. |
Citation: | APL Photonics, 2020; 5(4):046101-1-046101-7 |
Publisher: | AIP Publishing |
Issue Date: | 2020 |
ISSN: | 2378-0967 2378-0967 |
Statement of Responsibility: | Rajour Tanyi Ako, Wendy S.L. Lee, Shaghik Atakaramians, Madhu Bhaskaran, Sharath Sriram, and Withawat Withayachumnankul |
Abstract: | Polarization control is shown to enhance functionalities of terahertz waves in various applications. As a step toward introducing efficient practical devices operating in the terahertz band, we propose and experimentally validate a free-standing three-layer polarization converter operating in transmission. The device can efficiently convert a linearly polarized terahertz wave to its orthogonal counterpart. Our device comprises split-ring and H-shaped resonators inserted between two layers of orthogonal wire gratings. The sole dielectric material is a cyclic olefin copolymer (COC) that has exceptionally low-loss to terahertz waves. The measurement demonstrates a conversion efficiency of >80%, over 0.2–1.0 THz, giving an ultra-wide bandwidth of 133%. The wide bandwidth is attributed to multiple resonances of the two resonators in a unit cell. Importantly, an unconventional fabrication process yields a multi-layer low-loss COC that leads to high efficiency. The proposed design can also be tailored for practical applications across the electromagnetic spectrum. |
Rights: | © 2020 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). https://doi.org/10.1063/1.5144115., |
DOI: | 10.1063/1.5144115 |
Grant ID: | http://purl.org/au-research/grants/arc/DP170101922 http://purl.org/au-research/grants/arc/LE150100001 http://purl.org/au-research/grants/arc/LE180100003 |
Published version: | http://dx.doi.org/10.1063/1.5144115 |
Appears in Collections: | Aurora harvest 8 Electrical and Electronic Engineering publications |
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