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Mid-infrared all-optical modulation in low-loss germanium-on-silicon waveguides

Mid-infrared all-optical modulation in low-loss germanium-on-silicon waveguides
Mid-infrared all-optical modulation in low-loss germanium-on-silicon waveguides
All-optical modulation has been demonstrated in a germanium-on-silicon rib waveguide over the mid-infrared wavelength range of 2-3µm using a free-carrier absorption scheme. Transmission measurements have shown the waveguides to have low propagation losses that are relatively independent of wavelength out to 3.8µm, indicating that the modulation could be extended further into the mid-infrared region for applications in sensing and spectroscopy. By monitoring the material recovery, the free-carrier lifetime of the micron-sized waveguides has been estimated to be ~18ns, allowing for modulation speeds within the megahertz regime.
0146-9592
268-271
Shen, Li
f45b1185-ca40-4af3-8b79-d444dc11dc8f
Healy, Noel
26eec85c-8d12-4f21-a67a-022f8dc2daab
Mitchell, Colin J.
0e48c936-a405-434d-818a-d83e382aa826
Soler Penadés, Jordi
f18f3619-0d71-4547-95fd-dd38c37b7adb
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Peacock, Anna C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc
Shen, Li
f45b1185-ca40-4af3-8b79-d444dc11dc8f
Healy, Noel
26eec85c-8d12-4f21-a67a-022f8dc2daab
Mitchell, Colin J.
0e48c936-a405-434d-818a-d83e382aa826
Soler Penadés, Jordi
f18f3619-0d71-4547-95fd-dd38c37b7adb
Nedeljković, Milos
b64e21c2-1b95-479d-a35c-3456dff8c796
Mashanovich, Goran Z.
c806e262-af80-4836-b96f-319425060051
Peacock, Anna C.
685d924c-ef6b-401b-a0bd-acf1f8e758fc

Shen, Li, Healy, Noel, Mitchell, Colin J., Soler Penadés, Jordi, Nedeljković, Milos, Mashanovich, Goran Z. and Peacock, Anna C. (2015) Mid-infrared all-optical modulation in low-loss germanium-on-silicon waveguides. Optics Letters, 40 (2), 268-271. (doi:10.1364/OL.40.000268).

Record type: Article

Abstract

All-optical modulation has been demonstrated in a germanium-on-silicon rib waveguide over the mid-infrared wavelength range of 2-3µm using a free-carrier absorption scheme. Transmission measurements have shown the waveguides to have low propagation losses that are relatively independent of wavelength out to 3.8µm, indicating that the modulation could be extended further into the mid-infrared region for applications in sensing and spectroscopy. By monitoring the material recovery, the free-carrier lifetime of the micron-sized waveguides has been estimated to be ~18ns, allowing for modulation speeds within the megahertz regime.

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More information

Accepted/In Press date: 29 November 2014
Published date: 2015
Organisations: Optoelectronics Research Centre, Photonic Systems Circuits & Sensors

Identifiers

Local EPrints ID: 375053
URI: https://eprints.soton.ac.uk/id/eprint/375053
ISSN: 0146-9592
PURE UUID: 5c83c9c1-ba2a-4d55-b1de-747e7363af3b
ORCID for Jordi Soler Penadés: ORCID iD orcid.org/0000-0002-1706-8533
ORCID for Milos Nedeljković: ORCID iD orcid.org/0000-0002-9170-7911
ORCID for Anna C. Peacock: ORCID iD orcid.org/0000-0002-1940-7172

Catalogue record

Date deposited: 11 Mar 2015 12:06
Last modified: 03 Dec 2019 01:50

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