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Silicon and germanium suspended waveguides for the mid-infrared

Silicon and germanium suspended waveguides for the mid-infrared
Silicon and germanium suspended waveguides for the mid-infrared

Both silicon and germanium are very interesting materials for mid-infrared applications, particularly sensing, due to their low material losses at long wavelengths. Silicon is low loss up to 8 μm, and germanium up to 15 μm [1]. To fully exploit these long wavelength transmission ranges of Si and Ge, and to build Si and Ge long wavelength photonic circuits, cladding materials need to have the same or larger transmission wavelength ranges than Si or Ge. One solution is to remove a lossy substrate and create Si and Ge suspended structures with air cladding. In the case of SOI, buried oxide can be removed by HF [2,3], and for the Ge-on-Si platform, Si substrate can be removed by TMAH. In this paper we report on the fabrication and characterization of suspended Ge waveguides at a wavelength of 3.8 μm, and on Si waveguides operating at a wavelength of 7.7 μm, both of which are the longest reported wavelengths for the two platforms.

2376-8614
181-182
IEEE
Osman, A.
eb387b50-c718-47df-ac90-97b2efd3e335
Soler-Penadés, J.
f18f3619-0d71-4547-95fd-dd38c37b7adb
Sanchez-Postigo, A.
81499766-b4c1-48ce-8143-9bdd49621d81
Wu, Y.
000d8846-20f2-4cea-b496-f6f4b73a171f
Qu, Z.
ff376b43-4352-4bd2-8420-c1c6cfccd45c
Wanguemert-Perez, J.G.
28f10fc0-17b9-44f0-bad0-dab421273c95
Ortega-Monux, A.
2187ad4e-6b90-4354-83ce-da964b85e0fe
Halir, R.
e3f8d90b-0067-4e1a-a6b1-0217c342dd55
Cheben, P.
9a2e25a5-6aa0-414e-a061-23416efedebc
Molina-Fernandez, I.
156ad1de-c209-43ce-91e4-e4106dcb1edf
Nedeljković, M.
b64e21c2-1b95-479d-a35c-3456dff8c796
Mashanovich, G.Z.
c806e262-af80-4836-b96f-319425060051
Osman, A.
eb387b50-c718-47df-ac90-97b2efd3e335
Soler-Penadés, J.
f18f3619-0d71-4547-95fd-dd38c37b7adb
Sanchez-Postigo, A.
81499766-b4c1-48ce-8143-9bdd49621d81
Wu, Y.
000d8846-20f2-4cea-b496-f6f4b73a171f
Qu, Z.
ff376b43-4352-4bd2-8420-c1c6cfccd45c
Wanguemert-Perez, J.G.
28f10fc0-17b9-44f0-bad0-dab421273c95
Ortega-Monux, A.
2187ad4e-6b90-4354-83ce-da964b85e0fe
Halir, R.
e3f8d90b-0067-4e1a-a6b1-0217c342dd55
Cheben, P.
9a2e25a5-6aa0-414e-a061-23416efedebc
Molina-Fernandez, I.
156ad1de-c209-43ce-91e4-e4106dcb1edf
Nedeljković, M.
b64e21c2-1b95-479d-a35c-3456dff8c796
Mashanovich, G.Z.
c806e262-af80-4836-b96f-319425060051

Osman, A., Soler-Penadés, J., Sanchez-Postigo, A., Wu, Y., Qu, Z., Wanguemert-Perez, J.G., Ortega-Monux, A., Halir, R., Cheben, P., Molina-Fernandez, I., Nedeljković, M. and Mashanovich, G.Z. (2018) Silicon and germanium suspended waveguides for the mid-infrared. In IEEE Photonics Society Summer Topicals Meeting Series, SUM 2018. IEEE. pp. 181-182 . (doi:10.1109/PHOSST.2018.8456763).

Record type: Conference or Workshop Item (Paper)

Abstract

Both silicon and germanium are very interesting materials for mid-infrared applications, particularly sensing, due to their low material losses at long wavelengths. Silicon is low loss up to 8 μm, and germanium up to 15 μm [1]. To fully exploit these long wavelength transmission ranges of Si and Ge, and to build Si and Ge long wavelength photonic circuits, cladding materials need to have the same or larger transmission wavelength ranges than Si or Ge. One solution is to remove a lossy substrate and create Si and Ge suspended structures with air cladding. In the case of SOI, buried oxide can be removed by HF [2,3], and for the Ge-on-Si platform, Si substrate can be removed by TMAH. In this paper we report on the fabrication and characterization of suspended Ge waveguides at a wavelength of 3.8 μm, and on Si waveguides operating at a wavelength of 7.7 μm, both of which are the longest reported wavelengths for the two platforms.

Full text not available from this repository.

More information

Published date: 5 September 2018
Venue - Dates: 2018 IEEE Photonics Society Summer Topicals Meeting Series, Waikoloa, United States, 2018-07-09 - 2018-07-11

Identifiers

Local EPrints ID: 425409
URI: https://eprints.soton.ac.uk/id/eprint/425409
ISSN: 2376-8614
PURE UUID: b243a591-a63f-4998-b56b-d61f51b63008
ORCID for A. Osman: ORCID iD orcid.org/0000-0001-6575-3861
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: 18 Oct 2018 16:30
Last modified: 20 Jul 2019 00:37

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