Suspended silicon waveguides for long-wave infrared wavelengths
Suspended silicon waveguides for long-wave infrared wavelengths
In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm with a propagation loss of 3.1± 0.3 dB∕cm. To our knowledge, this is the first demonstration of low-loss silicon waveguides at such a long wavelength, with loss comparable to other platforms that use more exotic materials. The suspended Si waveguide core is supported by a sub-wavelength grating that provides lateral optical confinement while also allowing access to the buried oxide layer so that it can be wet etched using hydrofluoric acid. We also demonstrate low-loss waveguide bends and s-bends.
Integrated optics, Infrared, Semiconductors, Subwavelength structures, Gratings
795-798
Soler Penadés, J.
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Sánchez-Postigo, A.
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Nedeljković, M.
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Ortega-Moñux, A.
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Wangüemert-Pérez, J. G.
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Xu, Y.
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Halir, R.
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Qu, Z.
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Khokhar, A. Z.
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Osman, A.
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Cao, W.
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Littlejohns, C. G.
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Cheben, P.
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Molina-Fernández, I.
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Mashanovich, G.Z.
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9 February 2018
Soler Penadés, J.
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Sánchez-Postigo, A.
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Nedeljković, M.
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Ortega-Moñux, A.
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Wangüemert-Pérez, J. G.
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Xu, Y.
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Halir, R.
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Qu, Z.
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Khokhar, A. Z.
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Osman, A.
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Cao, W.
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Littlejohns, C. G.
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Cheben, P.
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Molina-Fernández, I.
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Mashanovich, G.Z.
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Soler Penadés, J., Sánchez-Postigo, A., Nedeljković, M., Ortega-Moñux, A., Wangüemert-Pérez, J. G., Xu, Y., Halir, R., Qu, Z., Khokhar, A. Z., Osman, A., Cao, W., Littlejohns, C. G., Cheben, P., Molina-Fernández, I. and Mashanovich, G.Z.
(2018)
Suspended silicon waveguides for long-wave infrared wavelengths.
Optics Letters, 43 (4), .
(doi:10.1364/OL.43.000795).
Abstract
In this Letter, we report suspended silicon waveguides operating at a wavelength of 7.67 μm with a propagation loss of 3.1± 0.3 dB∕cm. To our knowledge, this is the first demonstration of low-loss silicon waveguides at such a long wavelength, with loss comparable to other platforms that use more exotic materials. The suspended Si waveguide core is supported by a sub-wavelength grating that provides lateral optical confinement while also allowing access to the buried oxide layer so that it can be wet etched using hydrofluoric acid. We also demonstrate low-loss waveguide bends and s-bends.
Text
Suspended silicon waveguides for long-wave infrared wavelengths
- Accepted Manuscript
Text
ol-43-4-795
- Version of Record
More information
Accepted/In Press date: 14 December 2017
e-pub ahead of print date: 18 December 2017
Published date: 9 February 2018
Keywords:
Integrated optics, Infrared, Semiconductors, Subwavelength structures, Gratings
Identifiers
Local EPrints ID: 416727
URI: http://eprints.soton.ac.uk/id/eprint/416727
ISSN: 0146-9592
PURE UUID: 5bdf7283-1989-4283-96b1-80a09d0b96b1
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Date deposited: 05 Jan 2018 17:30
Last modified: 28 Apr 2022 06:38
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Contributors
Author:
J. Soler Penadés
Author:
A. Sánchez-Postigo
Author:
A. Ortega-Moñux
Author:
J. G. Wangüemert-Pérez
Author:
Y. Xu
Author:
R. Halir
Author:
Z. Qu
Author:
A. Z. Khokhar
Author:
A. Osman
Author:
W. Cao
Author:
P. Cheben
Author:
I. Molina-Fernández
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