The University of Southampton
University of Southampton Institutional Repository

Nonlinear properties of laser-processed polycrystalline silicon waveguides for integrated photonics

Nonlinear properties of laser-processed polycrystalline silicon waveguides for integrated photonics
Nonlinear properties of laser-processed polycrystalline silicon waveguides for integrated photonics

We report nonlinear optical characterization of cm-long polycrystalline silicon (polySi) waveguides at telecom wavelengths. Laser post-processing of lithographically-patterned amorphous silicon deposited on silica-on-silicon substrates provides low-loss poly-Si waveguides with surface-tension-shaped boundaries. Achieving optical losses as low as 4 dB cm -1enabled us to demonstrate effects of self-phase modulation (SPM) and two-photon absorption (TPA). Analysis of the spectral broadening and nonlinear losses with numerical modeling reveals the best fit values of the Kerr coefficient n 2=4.5×10 -18m W -1and TPA coefficient β TPA=9.0×10 -12m 2W -1, which are within the range reported for crystalline silicon. On-chip low-loss poly-Si paves the way for flexible integration of nonlinear components in multi-layered photonic systems.

polysilicon, Laser processing, optical waveguide, Photonics, Nonlinear Optics, self phase modulation, two photon absorption, Silicon photonics
1094-4087
29192-29201
Aktaş, Ozan
2e90db41-f409-431f-9827-2e2577a52457
MacFarquhar, Stuart James
cff30fb5-a4b6-44ab-b1b3-138e7020fba3
Oo, Swe
6495f6da-8f17-4484-98fb-6151b4efbd9a
Tarazona, Antulio
c6ae87c5-c746-4f89-9ff0-9e7b6874e94f
Chong, Harold
795aa67f-29e5-480f-b1bc-9bd5c0d558e1
Peacock, Anna
685d924c-ef6b-401b-a0bd-acf1f8e758fc
Aktaş, Ozan
2e90db41-f409-431f-9827-2e2577a52457
MacFarquhar, Stuart James
cff30fb5-a4b6-44ab-b1b3-138e7020fba3
Oo, Swe
6495f6da-8f17-4484-98fb-6151b4efbd9a
Tarazona, Antulio
c6ae87c5-c746-4f89-9ff0-9e7b6874e94f
Chong, Harold
795aa67f-29e5-480f-b1bc-9bd5c0d558e1
Peacock, Anna
685d924c-ef6b-401b-a0bd-acf1f8e758fc

Aktaş, Ozan, MacFarquhar, Stuart James, Oo, Swe, Tarazona, Antulio, Chong, Harold and Peacock, Anna (2020) Nonlinear properties of laser-processed polycrystalline silicon waveguides for integrated photonics. Optics Express, 28 (20), 29192-29201. (doi:10.1364/OE.400536).

Record type: Article

Abstract

We report nonlinear optical characterization of cm-long polycrystalline silicon (polySi) waveguides at telecom wavelengths. Laser post-processing of lithographically-patterned amorphous silicon deposited on silica-on-silicon substrates provides low-loss poly-Si waveguides with surface-tension-shaped boundaries. Achieving optical losses as low as 4 dB cm -1enabled us to demonstrate effects of self-phase modulation (SPM) and two-photon absorption (TPA). Analysis of the spectral broadening and nonlinear losses with numerical modeling reveals the best fit values of the Kerr coefficient n 2=4.5×10 -18m W -1and TPA coefficient β TPA=9.0×10 -12m 2W -1, which are within the range reported for crystalline silicon. On-chip low-loss poly-Si paves the way for flexible integration of nonlinear components in multi-layered photonic systems.

Text
manuscript_v5 - Author's Original
Restricted to Repository staff only
Request a copy
Text
Accepted Manuscript Op Exs - Accepted Manuscript
Available under License Creative Commons Attribution.
Download (789kB)

More information

Submitted date: 16 June 2020
Accepted/In Press date: 27 August 2020
Published date: 28 September 2020
Keywords: polysilicon, Laser processing, optical waveguide, Photonics, Nonlinear Optics, self phase modulation, two photon absorption, Silicon photonics

Identifiers

Local EPrints ID: 443412
URI: http://eprints.soton.ac.uk/id/eprint/443412
ISSN: 1094-4087
PURE UUID: 73bc2a12-6d8f-410c-99a7-c39c38d9ab20
ORCID for Ozan Aktaş: ORCID iD orcid.org/0000-0002-2255-7761
ORCID for Stuart James MacFarquhar: ORCID iD orcid.org/0000-0002-4378-7670
ORCID for Harold Chong: ORCID iD orcid.org/0000-0002-7110-5761
ORCID for Anna Peacock: ORCID iD orcid.org/0000-0002-1940-7172

Catalogue record

Date deposited: 24 Aug 2020 16:35
Last modified: 18 Feb 2021 17:31

Export record

Altmetrics

Contributors

Author: Ozan Aktaş ORCID iD
Author: Stuart James MacFarquhar ORCID iD
Author: Swe Oo
Author: Antulio Tarazona
Author: Harold Chong ORCID iD
Author: Anna Peacock ORCID iD

University divisions

Download statistics

Downloads from ePrints over the past year. Other digital versions may also be available to download e.g. from the publisher's website.

View more statistics

Atom RSS 1.0 RSS 2.0

Contact ePrints Soton: eprints@soton.ac.uk

ePrints Soton supports OAI 2.0 with a base URL of http://eprints.soton.ac.uk/cgi/oai2

This repository has been built using EPrints software, developed at the University of Southampton, but available to everyone to use.

We use cookies to ensure that we give you the best experience on our website. If you continue without changing your settings, we will assume that you are happy to receive cookies on the University of Southampton website.

×