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Sub-wavelength cladding mid-infrared devices

Sub-wavelength cladding mid-infrared devices
Sub-wavelength cladding mid-infrared devices
Suspended structures enable low loss propagation in silicon waveguides for mid-infrared wavelengths by removing the lossy buried oxide (BOX) layer. We previously demonstrated suspended waveguides with a silicon core and a sub-wavelength grating (SWG) lateral cladding, which allows access to the buried oxide layer for under-etching with hydrofluoric acid. Here we show that bends, multimode interference couplers (MMI) and Mach-Zehnder interferometers (MZI) can be successfully implemented in this platform. Specifically, we report waveguides with propagation losses of 1.2 dB/cm, 90° bends with 0.03 dB/bend loss, compact MMI couplers with imbalances of 0.5 dB, and MZI structures with extinction ratios in excess of 24 dB.
183-184
Soler Penadés, J.
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Nedeljković, M.
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Khokhar, A.Z.
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Mashanovich, G.Z.
c806e262-af80-4836-b96f-319425060051
Ortega-Moñux, A.
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Wangüemert-Pérez, G.
46c2536e-bbf1-486c-b134-ebe9539eba02
Halir, R.
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Molina-Fernández, I.
9a123b9e-a12a-417e-b35d-f55d589af32b
Cheben, P.
9a2e25a5-6aa0-414e-a061-23416efedebc
Soler Penadés, J.
f18f3619-0d71-4547-95fd-dd38c37b7adb
Nedeljković, M.
b64e21c2-1b95-479d-a35c-3456dff8c796
Khokhar, A.Z.
2eedd1cc-8ac5-4f8e-be25-930bd3eae396
Mashanovich, G.Z.
c806e262-af80-4836-b96f-319425060051
Ortega-Moñux, A.
1ddc0007-ad93-424f-909e-1891ebd4973e
Wangüemert-Pérez, G.
46c2536e-bbf1-486c-b134-ebe9539eba02
Halir, R.
e3f8d90b-0067-4e1a-a6b1-0217c342dd55
Molina-Fernández, I.
9a123b9e-a12a-417e-b35d-f55d589af32b
Cheben, P.
9a2e25a5-6aa0-414e-a061-23416efedebc

Soler Penadés, J., Nedeljković, M., Khokhar, A.Z., Mashanovich, G.Z., Ortega-Moñux, A., Wangüemert-Pérez, G., Halir, R., Molina-Fernández, I. and Cheben, P. (2015) Sub-wavelength cladding mid-infrared devices. 12th IEEE International Conference on Group IV Photonics (GFP), , Vancouver, Canada. 26 - 28 Aug 2015. pp. 183-184 . (doi:10.1109/Group4.2015.7305897).

Record type: Conference or Workshop Item (Paper)

Abstract

Suspended structures enable low loss propagation in silicon waveguides for mid-infrared wavelengths by removing the lossy buried oxide (BOX) layer. We previously demonstrated suspended waveguides with a silicon core and a sub-wavelength grating (SWG) lateral cladding, which allows access to the buried oxide layer for under-etching with hydrofluoric acid. Here we show that bends, multimode interference couplers (MMI) and Mach-Zehnder interferometers (MZI) can be successfully implemented in this platform. Specifically, we report waveguides with propagation losses of 1.2 dB/cm, 90° bends with 0.03 dB/bend loss, compact MMI couplers with imbalances of 0.5 dB, and MZI structures with extinction ratios in excess of 24 dB.

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More information

Published date: 26 October 2015
Venue - Dates: 12th IEEE International Conference on Group IV Photonics (GFP), , Vancouver, Canada, 2015-08-26 - 2015-08-28

Identifiers

Local EPrints ID: 442353
URI: http://eprints.soton.ac.uk/id/eprint/442353
PURE UUID: 1b217fc4-a75c-4b06-a21c-fca4f4b5a2d5
ORCID for J. Soler Penadés: ORCID iD orcid.org/0000-0002-1706-8533
ORCID for M. Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911

Catalogue record

Date deposited: 14 Jul 2020 16:31
Last modified: 08 Jan 2022 03:22

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Contributors

Author: J. Soler Penadés ORCID iD
Author: M. Nedeljković ORCID iD
Author: A.Z. Khokhar
Author: A. Ortega-Moñux
Author: G. Wangüemert-Pérez
Author: R. Halir
Author: I. Molina-Fernández
Author: P. Cheben

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