Physical and optical characterisation of Ge-implanted silica

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Show simple item record Dowd, A Llewellyn, D Elliman, RG Luther-Davies, B Samoc, M Fitz Gerald, JD 2010-05-28T09:42:41Z 2001-04
dc.identifier.citation Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms, 2001, 175-177 pp. 637 - 640
dc.identifier.issn 0168-583X
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract Ge nanocrystals formed in silica by implantation with 1.0 MeV Ge ions and subsequent annealing at 1100°C were characterised by transmission electron microscopy and Raman spectroscopy. The nanocrystals were found to be approximately spherical in shape and to have a structure consistent with that of bulk Ge. The average size of the crystallites increased with increasing fluence and for a fluence of 1 × 1017 Ge cm-2 the size varied from 2.5 to 12 nm. The nonlinear optical response of the material was measured at a wavelength of 800 nm using degenerative four wave mixing and z-scan techniques. The former provided information about the magnitude and temporal response of the nonlinearity whilst the latter provided information about the operative mechanism. The magnitude of the nonlinear refractive index, |n2|, was shown to be more than three-orders of magnitude larger than that of pure silica and to have a relaxation time of the order of picoseconds. The mechanism causing this nonlinear response is shown to be absorptive and to increase with increasing implant fluence as a consequence. © 2001 Elsevier Science B.V.
dc.language eng
dc.relation.isbasedon 10.1016/S0168-583X(00)00536-X
dc.title Physical and optical characterisation of Ge-implanted silica
dc.type Journal Article
dc.parent Nuclear Instruments and Methods in Physics Research, Section B: Beam Interactions with Materials and Atoms
dc.journal.volume 175-177
dc.journal.number en_US
dc.publocation Amsterdam, Netherlands en_US
dc.identifier.startpage 637 en_US
dc.identifier.endpage 640 en_US SCI.Physics and Advanced Materials en_US
dc.conference Verified OK en_US
dc.for 0204 Condensed Matter Physics
dc.for 0205 Optical Physics
dc.personcode 030626
dc.percentage 50 en_US Optical Physics en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Four-wave mixing
dc.description.keywords Ion-implantation
dc.description.keywords Nanocrystals
dc.description.keywords Nonlinear optics
dc.description.keywords z-scan
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - Materials and Technology for Energy Efficiency
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
pubs.consider-herdc false
utslib.collection.history School of Physics and Advanced Materials (ID: 343)
utslib.collection.history Closed (ID: 3)

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