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Silicon ring resonator-coupled Mach-Zehnder interferometers for the Fano resonance in the mid-IR

Silicon ring resonator-coupled Mach-Zehnder interferometers for the Fano resonance in the mid-IR
Silicon ring resonator-coupled Mach-Zehnder interferometers for the Fano resonance in the mid-IR
We present ring resonator (RR)-coupled Mach–Zehnder interferometers (MZIs) based on silicon-on-insulator rib waveguides, operating around the mid-IR wavelength of 3.8 μm. A number of different photonic integrated devices have been designed and fabricated experimentally to obtain the asymmetric Fano resonances in the mid-IR. We have investigated the influence of the coupling efficiency between the RR and the MZI as well as the phase shift between the two arms of the MZI on the Fano-type resonance spectral features, in agreement with theoretical predictions. Finally, wavelength-dependent Fano transmittances have been successfully measured with insertion losses up to ∼1  dB and extinction ratios of ∼20  dB. A slope of sharp Fano resonances as high as −574.6/μm has been achieved and estimated to be 35.5% higher than the slope of single RR Lorentzian-type resonances.
0003-6935
8769-8776
Troia, Benedetto
e90140d1-2449-4ca0-b2d4-aac7a1464c5c
Soler Penadés, Jordi
f18f3619-0d71-4547-95fd-dd38c37b7adb
Qu, Zhibo
ff376b43-4352-4bd2-8420-c1c6cfccd45c
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Osman, Ahmed
eb387b50-c718-47df-ac90-97b2efd3e335
Wu, Yangbo
000d8846-20f2-4cea-b496-f6f4b73a171f
Stirling, Callum
b0730967-9d4f-4b1e-8cd2-00cc62e42bf2
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Passaro, Vittorio M.N.
787696b6-5fbe-4ec7-9a7f-b76b132ac819
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Troia, Benedetto
e90140d1-2449-4ca0-b2d4-aac7a1464c5c
Soler Penadés, Jordi
f18f3619-0d71-4547-95fd-dd38c37b7adb
Qu, Zhibo
ff376b43-4352-4bd2-8420-c1c6cfccd45c
Khokhar, Ali
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Osman, Ahmed
eb387b50-c718-47df-ac90-97b2efd3e335
Wu, Yangbo
000d8846-20f2-4cea-b496-f6f4b73a171f
Stirling, Callum
b0730967-9d4f-4b1e-8cd2-00cc62e42bf2
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Passaro, Vittorio M.N.
787696b6-5fbe-4ec7-9a7f-b76b132ac819
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051

Troia, Benedetto, Soler Penadés, Jordi, Qu, Zhibo, Khokhar, Ali, Osman, Ahmed, Wu, Yangbo, Stirling, Callum, Nedeljković, Milos, Passaro, Vittorio M.N. and Mashanovich, Goran Z. (2017) Silicon ring resonator-coupled Mach-Zehnder interferometers for the Fano resonance in the mid-IR. Applied Optics, 56 (31), 8769-8776. (doi:10.1364/AO.56.008769).

Record type: Article

Abstract

We present ring resonator (RR)-coupled Mach–Zehnder interferometers (MZIs) based on silicon-on-insulator rib waveguides, operating around the mid-IR wavelength of 3.8 μm. A number of different photonic integrated devices have been designed and fabricated experimentally to obtain the asymmetric Fano resonances in the mid-IR. We have investigated the influence of the coupling efficiency between the RR and the MZI as well as the phase shift between the two arms of the MZI on the Fano-type resonance spectral features, in agreement with theoretical predictions. Finally, wavelength-dependent Fano transmittances have been successfully measured with insertion losses up to ∼1  dB and extinction ratios of ∼20  dB. A slope of sharp Fano resonances as high as −574.6/μm has been achieved and estimated to be 35.5% higher than the slope of single RR Lorentzian-type resonances.

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Silicon ring resonator-coupled Mach-Zehnder - Accepted Manuscript
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Accepted/In Press date: 4 October 2017
e-pub ahead of print date: 31 October 2017

Identifiers

Local EPrints ID: 416394
URI: https://eprints.soton.ac.uk/id/eprint/416394
ISSN: 0003-6935
PURE UUID: bf87ba18-4a17-4e09-81d9-4deb92e2892c
ORCID for Jordi Soler Penadés: ORCID iD orcid.org/0000-0002-1706-8533
ORCID for Ahmed Osman: ORCID iD orcid.org/0000-0001-6575-3861
ORCID for Callum Stirling: ORCID iD orcid.org/0000-0001-5274-2100
ORCID for Milos Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911

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Date deposited: 15 Dec 2017 17:30
Last modified: 20 Jul 2019 04:38

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