Title

Silicon-in-silica spheres via axial thermal gradient in-fibre capillary instabilities

Authors

Authors

A. Gumennik; L. Wei; G. Lestoquoy; A. M. Stolyarov; X. T. Jia; P. H. Rekemeyer; M. J. Smith; X. D. Liang; B. J. B. Grena; S. G. Johnson; S. Gradecak; A. F. Abouraddy; J. D. Joannopoulos;Y. Fink

Comments

Authors: contact us about adding a copy of your work at STARS@ucf.edu

Abbreviated Journal Title

Nat. Commun.

Keywords

OPTICAL-FIBER; ELECTRICAL-CONDUCTIVITY; POLYCRYSTALLINE SILICON; Multidisciplinary Sciences

Abstract

The ability to produce small scale, crystalline silicon spheres is of significant technological and scientific importance, yet scalable methods for doing so have remained elusive. Here we demonstrate a silicon nanosphere fabrication process based on an optical fibre drawing technique. A silica-cladded silicon-core fibre with diameters down to 340 nm is continuously fed into a flame defining an axial thermal gradient and the continuous formation of spheres whose size is controlled by the feed speed is demonstrated. In particular, spheres of diameter <500 nm smaller than those produced under isothermal heating conditions are shown and analysed. A fibre with dual cores, p-type and n-type silicon, is drawn and processed into spheres. Spatially coherent break-up leads to the joining of the spheres into a bispherical silicon 'p-n molecule'. The resulting device is measured to reveal a rectifying I-V curve consistent with the formation of a p-n junction.

Journal Title

Nature Communications

Volume

4

Publication Date

1-1-2013

Document Type

Article

Language

English

First Page

8

WOS Identifier

WOS:000323717300004

ISSN

2041-1723

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