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10 nm SiO2 TM slot mode in laterally mismatched asymmetric fin-waveguides

10 nm SiO2 TM slot mode in laterally mismatched asymmetric fin-waveguides
10 nm SiO2 TM slot mode in laterally mismatched asymmetric fin-waveguides
In this paper we demonstrate that by breaking the left/right symmetry in a bi-planar double-silicon on insulator (SOI) photonic crystal (PhC) fin-waveguide, we can couple the conventionally used transverse-electric (TE) polarized mode to the transverse-magnetic (TM) polarization slot-mode. Finite difference time domain (FDTD) simulations indicate that the TE mode couples to the robust TM mode inside the Brillouin zone. Broadband transmission data shows propagation identified with horizontal-slot TM mode within the TE bandgap for fully mismatched fabricated devices. This simultaneously demonstrates TE to TM mode conversion, and the narrowest Si photonics SiO2 slot-mode propagation reported in the literature (10 nm wide slot), which both have many
potential telecommunication applications.
anisotropic wet etching, double-SOI, misaligned photonic crystal, polarization conversion, silicon photonics, slot-mode
0429-7725
237
Byers, James J.
f64a1b0d-87c1-4d2f-9539-84857a6d862e
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Arimoto, Hideo
b88aab51-ad62-4127-9ca5-d86e3d714531
Husain, Muhammad K.
92db1f76-6760-4cf2-8e30-5d4a602fe15b
Sotto, Moise
2e7797fc-4433-4513-bd08-03ab7839452c
Hillier, Joseph, William
3621050b-74de-4fb7-b1ee-968965966336
Kiang, Kian Shen
fdb609c6-75aa-4893-85c8-8e50edfda7fe
Thomson, David
17c1626c-2422-42c6-98e0-586ae220bcda
Reed, Graham T.
ca08dd60-c072-4d7d-b254-75714d570139
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc
Byers, James J.
f64a1b0d-87c1-4d2f-9539-84857a6d862e
Debnath, Kapil
aa01749d-524b-4464-b90a-af072e92a02f
Arimoto, Hideo
b88aab51-ad62-4127-9ca5-d86e3d714531
Husain, Muhammad K.
92db1f76-6760-4cf2-8e30-5d4a602fe15b
Sotto, Moise
2e7797fc-4433-4513-bd08-03ab7839452c
Hillier, Joseph, William
3621050b-74de-4fb7-b1ee-968965966336
Kiang, Kian Shen
fdb609c6-75aa-4893-85c8-8e50edfda7fe
Thomson, David
17c1626c-2422-42c6-98e0-586ae220bcda
Reed, Graham T.
ca08dd60-c072-4d7d-b254-75714d570139
Charlton, Martin
fcf86ab0-8f34-411a-b576-4f684e51e274
Saito, Shinichi
14a5d20b-055e-4f48-9dda-267e88bd3fdc

Byers, James J., Debnath, Kapil, Arimoto, Hideo, Husain, Muhammad K., Sotto, Moise, Hillier, Joseph, William, Kiang, Kian Shen, Thomson, David, Reed, Graham T., Charlton, Martin and Saito, Shinichi (2021) 10 nm SiO2 TM slot mode in laterally mismatched asymmetric fin-waveguides. Frontiers in Physics, 9, 237, [659585]. (doi:10.3389/fphy.2021.659585).

Record type: Article

Abstract

In this paper we demonstrate that by breaking the left/right symmetry in a bi-planar double-silicon on insulator (SOI) photonic crystal (PhC) fin-waveguide, we can couple the conventionally used transverse-electric (TE) polarized mode to the transverse-magnetic (TM) polarization slot-mode. Finite difference time domain (FDTD) simulations indicate that the TE mode couples to the robust TM mode inside the Brillouin zone. Broadband transmission data shows propagation identified with horizontal-slot TM mode within the TE bandgap for fully mismatched fabricated devices. This simultaneously demonstrates TE to TM mode conversion, and the narrowest Si photonics SiO2 slot-mode propagation reported in the literature (10 nm wide slot), which both have many
potential telecommunication applications.

Other
659585_Manuscript_accepted - Accepted Manuscript
Available under License Creative Commons Attribution.
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More information

Submitted date: 27 January 2021
Published date: 27 May 2021
Additional Information: Funding Information: This work was supported by the EPSRC Standard Grant (EP/M009416/1), EPSRC Standard Grant (EP/S034242/1), EPSRC Manufacturing Fellowship (EP/M008975/1), EPSRC Platform Grant (EP/N013247/1), and The University of Southampton Zepler Institute Research Collaboration Stimulus Fund. DT acknowledges funding from the Royal Society for his University Research Fellowship. Publisher Copyright: © Copyright © 2021 Byers, Debnath, Arimoto, Husain, Sotto, Hillier, Kiang, Thomson, Reed, Charlton and Saito. Copyright: Copyright 2021 Elsevier B.V., All rights reserved.
Keywords: anisotropic wet etching, double-SOI, misaligned photonic crystal, polarization conversion, silicon photonics, slot-mode

Identifiers

Local EPrints ID: 450901
URI: http://eprints.soton.ac.uk/id/eprint/450901
ISSN: 0429-7725
PURE UUID: 51a133d7-a358-4089-9c43-03b39a35ee87
ORCID for Joseph, William Hillier: ORCID iD orcid.org/0000-0003-4418-0819
ORCID for Kian Shen Kiang: ORCID iD orcid.org/0000-0002-7326-909X
ORCID for Shinichi Saito: ORCID iD orcid.org/0000-0003-1539-1182

Catalogue record

Date deposited: 19 Aug 2021 16:34
Last modified: 30 Nov 2021 02:51

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Contributors

Author: James J. Byers
Author: Kapil Debnath
Author: Hideo Arimoto
Author: Muhammad K. Husain
Author: Moise Sotto
Author: Joseph, William Hillier ORCID iD
Author: Kian Shen Kiang ORCID iD
Author: David Thomson
Author: Graham T. Reed
Author: Martin Charlton
Author: Shinichi Saito ORCID iD

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