Please use this identifier to cite or link to this item:
Scopus Web of Science® Altmetric
Type: Journal article
Title: Characteristics of effective-medium-clad dielectric waveguides
Author: Gao, W.
Lee, W.S.L.
Yu, X.
Fujita, M.
Nagatsuma, T.
Fumeaux, C.
Withayachumnankul, W.
Citation: IEEE Transactions on Terahertz Science and Technology, 2021; 11(1):28-41
Publisher: Institute of Electrical and Electronics Engineers
Issue Date: 2021
ISSN: 2156-342X
Statement of
Weijie Gao, Wendy S. L. Lee, Xiongbin Yu, Masayuki Fujita, Tadao Nagatsuma, Christophe Fumeaux ... et al.
Abstract: Effective-medium-clad dielectric waveguides are purely built into a single high-resistivity float-zone silicon wafer with their claddings defined by deep subwavelength perforations. The waveguides are substrate-free while supporting both E x 11 and E y 11 modes with low loss and low dispersion. This article extends the investigations of the waveguides by analyzing the dispersion, cross-polarization, and crosstalk together with the characteristics of bends and crossings over an operation frequency range of 220- 330 GHz (WR-3 band). Taking the E x 11 mode as an example, the experimental results show an average measured attenuation coefficient of 0.075 dB/cm and a group velocity dispersion ranging from around ±10 ps/THz/mm across the whole band. A crosstalk level below -10 dB is measured for parallel waveguides with a separation of 0.52λ 0 at 300 GHz. The realized waveguides show a bending loss ranging from 0.500 to 0.025 dB per bend and a crosstalk at crossing below -15 dB from 220 to 330 GHz. Due to the different dispersion characteristics, the E y 11 mode has similar performances but with its operation frequency range reduced to 260-330 GHz. Limited by the measurement setup, a cross-coupling between the E x 11 and E y 11 modes is measured to be below -20 dB over the whole band. This in-depth investigation of effective-medium-clad waveguides will form a basis for terahertz-integrated platforms.
Keywords: Optical waveguides; silicon; dispersion; dielectrics; permittivity; crosstalk
Rights: © 2021, IEEE
DOI: 10.1109/TTHZ.2020.3023917
Grant ID: DP180103561
Published version:
Appears in Collections:Aurora harvest 8
Electrical and Electronic Engineering publications

Files in This Item:
There are no files associated with this item.

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.