Synchrotron-laser interactions in hexagonal boron nitride: an examination of charge trapping dynamics at the boron K-edge

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dc.contributor.author Towlson, B. M.
dc.contributor.author Evans, D. A.
dc.contributor.author Poolton, Nigel
dc.contributor.author Hamilton, B.
dc.date.accessioned 2008-12-09T10:27:02Z
dc.date.available 2008-12-09T10:27:02Z
dc.date.issued 2006
dc.identifier.citation Towlson , B M , Evans , D A , Poolton , N & Hamilton , B 2006 , ' Synchrotron-laser interactions in hexagonal boron nitride: an examination of charge trapping dynamics at the boron K-edge ' New Journal of Physics , vol 8 , no. 5 , pp. 76 . en
dc.identifier.other PURE: 89464
dc.identifier.other dspace: 2160/1472
dc.identifier.uri http://hdl.handle.net/2160/1472
dc.identifier.uri http://www.iop.org/EJ/article/-search=33884179.1/1367-2630/8/5/076/njp6_5_076.html en
dc.description Poolton, Nigel; Towlson, B.M.; Hamilton, B.; Evans, D.A., (2006) 'Synchrotron-laser interactions in hexagonal boron nitride: an examination of charge trapping dynamics at the boron K-edge', New Journal of Physics 8 pp.76 RAE2008 en
dc.description.abstract Synchrotron–laser pump-probe (PP) luminescence measurements have been undertaken in hexagonal-phase boron nitride. For non-resonant excitation below the boron K-edge, the dynamics of the transients induced by the application of laser probes at 1.49, 2.33 and 3.07 eV are determined, as well as the signal recovery to equilibrium after the probes are removed. The transients are shown to be entirely related to the presence of trapping states within the material. By varying the synchrotron pump energy, the system dynamics are shown to change significantly, due to alteration in competition between the defect centres. As the synchrotron energy is scanned across the near-edge x-ray absorption (NEXAFS) region of the boron K-edge (190–205 eV), PP NEXAFS can be extracted directly from the trapping rate changes, and this opens the possibilities for directly linking particular charge trapping centres with their chemical environments. This is the first report where such processes have been used to obtain luminescence-based PP x-ray absorption spectra. en
dc.format.extent 76 en
dc.language.iso eng
dc.relation.ispartof New Journal of Physics en
dc.title Synchrotron-laser interactions in hexagonal boron nitride: an examination of charge trapping dynamics at the boron K-edge en
dc.type Text en
dc.type.publicationtype Article (Journal) en
dc.identifier.doi http://dx.doi.org/10.1088/1367-2630/8/5/076
dc.contributor.institution Institute of Mathematics & Physics (ADT) en
dc.contributor.institution Mathematics and Physics en
dc.description.status Peer reviewed en


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