The University of Southampton
University of Southampton Institutional Repository

Extreme electronic bandgap modification in laser-crystallized silicon optical fibres

Healy, Noel, Mailis, Sakellaris, Bulgakova, Nadezhda M., Sazio, Pier J.A., Day, Todd D., Sparks, Justin R., Cheng, Hiu Y., Badding, John V. and Peacock, Anna C. (2014) Extreme electronic bandgap modification in laser-crystallized silicon optical fibres Nature Materials, 13, (12), pp. 1122-1127.

Record type: Article


For decades now, silicon has been the workhorse of the microelectronics revolution and a key enabler of the Information age. Owing to its excellent optical properties in the near- and mid-infrared, silicon is now promising to have a similar impact on photonics. The ability to incorporate both optical and electronic functionality in a single material offers the tantalizing prospect of amplifying, modulating and detecting light within a monolithic platform. However, a direct consequence of silicon's transparency is that it cannot be used to detect light at telecommunications wavelengths. Here, we report on a laser processing technique developed for our silicon fibre technology through which we can modify the electronic band structure of the semiconductor material as it is crystallized. The unique fibre geometry in which the silicon core is confined within a silica cladding allows large anisotropic stresses to be set into the crystalline material so that the size of the bandgap can be engineered. We demonstrate extreme bandgap reductions from 1.11 eV down to 0.59 eV, enabling optical detection out to 2,100nm.

Full text not available from this repository.

More information

Published date: 28 September 2014
Organisations: Optoelectronics Research Centre


Local EPrints ID: 372182
ISSN: 1476-1122
PURE UUID: b98e2e48-9b6f-4aa2-95f9-ac781b8ab2d8
ORCID for Pier J.A. Sazio: ORCID iD
ORCID for Anna C. Peacock: ORCID iD

Catalogue record

Date deposited: 02 Dec 2014 11:11
Last modified: 09 Oct 2017 05:34

Export record


Author: Noel Healy
Author: Nadezhda M. Bulgakova
Author: Pier J.A. Sazio ORCID iD
Author: Todd D. Day
Author: Justin R. Sparks
Author: Hiu Y. Cheng
Author: John V. Badding
Author: Anna C. 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 supports OAI 2.0 with a base URL of

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.