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High-efficiency grating-couplers: demonstration of a new design strategy

High-efficiency grating-couplers: demonstration of a new design strategy
High-efficiency grating-couplers: demonstration of a new design strategy
We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of −0.8 dB (83%), well matching the experimental value of −0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.
2045-2322
1-8
Marchetti, Riccardo
6a52656c-7fda-488a-a012-2b373989e0b8
Lacava, Cosimo
a0a31a27-23ac-4a73-8bb4-2f02368fb8bd
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Chen, Xia
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Cristiani, Ilaria
ca05c320-279d-4b2a-af71-c506b3d20822
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Reed, Graham
ca08dd60-c072-4d7d-b254-75714d570139
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Minzioni, Paolo
b3c7ad72-d91c-42cf-be38-d949d6d2e264
Marchetti, Riccardo
6a52656c-7fda-488a-a012-2b373989e0b8
Lacava, Cosimo
a0a31a27-23ac-4a73-8bb4-2f02368fb8bd
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Chen, Xia
64f6ab92-ca11-4489-8c03-52bc986209ae
Cristiani, Ilaria
ca05c320-279d-4b2a-af71-c506b3d20822
Richardson, David
ebfe1ff9-d0c2-4e52-b7ae-c1b13bccdef3
Reed, Graham
ca08dd60-c072-4d7d-b254-75714d570139
Petropoulos, Periklis
522b02cc-9f3f-468e-bca5-e9f58cc9cad7
Minzioni, Paolo
b3c7ad72-d91c-42cf-be38-d949d6d2e264

Marchetti, Riccardo, Lacava, Cosimo, Khokhar, Ali, Chen, Xia, Cristiani, Ilaria, Richardson, David, Reed, Graham, Petropoulos, Periklis and Minzioni, Paolo (2017) High-efficiency grating-couplers: demonstration of a new design strategy. Scientific Reports, 7, 1-8. (doi:10.1038/s41598-017-16505-z).

Record type: Article

Abstract

We present a simple and practical strategy that allows to design high-efficiency grating couplers. The technique is based on the simultaneous apodization of two structural parameters: the grating period and the fill-factor, along with the optimization of the grating coupler etching depth. Considering a 260 nm Si-thick Silicon-on-insulator platform, we numerically demonstrated a coupling efficiency of −0.8 dB (83%), well matching the experimental value of −0.9 dB (81%). Thanks to the optimized design, these results represent the best performance ever reported in the literature for SOI structures without the use of any back-reflector.

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Accepted/In Press date: 13 November 2017
e-pub ahead of print date: 30 November 2017
Published date: 2017
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Identifiers

Local EPrints ID: 416125
URI: https://eprints.soton.ac.uk/id/eprint/416125
ISSN: 2045-2322
PURE UUID: f72aa6cf-bd23-46da-9b60-fa3d8850c73d
ORCID for Cosimo Lacava: ORCID iD orcid.org/0000-0002-9950-8642
ORCID for Xia Chen: ORCID iD orcid.org/0000-0002-0994-5401
ORCID for David Richardson: ORCID iD orcid.org/0000-0002-7751-1058
ORCID for Periklis Petropoulos: ORCID iD orcid.org/0000-0002-1576-8034

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Date deposited: 05 Dec 2017 17:30
Last modified: 10 Dec 2019 01:57

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