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.
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Mashanovich, G.Z.
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Ortega-Moñux, A.
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Wangüemert-Pérez, G.
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Halir, R.
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Molina-Fernández, I.
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Cheben, P.
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26 October 2015
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.
.
(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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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
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Date deposited: 14 Jul 2020 16:31
Last modified: 17 Mar 2024 03:35
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Contributors
Author:
J. Soler Penadés
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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