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An optical investigation of implantation damage as GaAs superlattices
Dissertation (MSc)--University of Pretoria, 2006.
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| Format: | Thesis |
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University of Pretoria
2013
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| _version_ | 1867613671856799744 |
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| access_status_str | Open Access |
| author2 | Brink, D.J. |
| author_browse | Brink, D.J. |
| author_facet | Brink, D.J. |
| collection | Thesis |
| dc_rights_str_mv | © 2004 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. |
| description | Dissertation (MSc)--University of Pretoria, 2006. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/24151 |
| institution | University of Pretoria (South Africa) |
| last_indexed | 2026-06-10T12:39:51.634Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/24151 An optical investigation of implantation damage as GaAs superlattices Brink, D.J. upetd@up.ac.za Haile, Kibreab Mebrahtom Superlattices as materials Hydrogen ion concentration Photoluminescence Raman effect Doped semiconductor superlattices UCTD Dissertation (MSc)--University of Pretoria, 2006. In this work tunability, implantation damage and recovery of GaAs doping superlattices implanted with hydrogen ions were studied. The applicability of two models of the optical properties of semiconductors was also investigated. GaAs doping superlattices were implanted with 0.5 MeV hydrogen ions at doses of 1012 cm-2, 1014 cm-2 and 1016 cm-2. This gradually modifies their optical characteristics from superlattice behaviour to something resembling the bulk material and beyond. Such a processing technique therefore provides a convenient way of tuning the optical properties of a superlattice semi-permanently. A combined result of ellipsometry and near infrared reflectance measurements showed that a single effective oscillator as well as a more advanced three-parameter model could be applied to the virgin and ion-implanted doping superlattices. This allowed us to determine the dose dependent effective band gap as well as other model parameters. Photoluminescence as well as normal and resonance Raman techniques were applied to study hydrogen ion implantation damage and its recovery. These techniques showed that implantation damage could be reversed to a large extent by a simple thermal annealing step. Physics unrestricted 2013-09-06T16:46:48Z 2005-05-05 2013-09-06T16:46:48Z 2004-04-20 2006-05-05 2005-04-26 Dissertation Haile, KM 2004, An optical investigation of implantation damage in GaAs superlattices, MSc dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://hdl.handle.net/2263/24151 > H925/ag http://hdl.handle.net/2263/24151 http://upetd.up.ac.za/thesis/available/etd-04262005-121141/ © 2004 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria. application/pdf University of Pretoria |
| spellingShingle | Superlattices as materials Hydrogen ion concentration Photoluminescence Raman effect Doped semiconductor superlattices UCTD An optical investigation of implantation damage as GaAs superlattices |
| title | An optical investigation of implantation damage as GaAs superlattices |
| title_full | An optical investigation of implantation damage as GaAs superlattices |
| title_fullStr | An optical investigation of implantation damage as GaAs superlattices |
| title_full_unstemmed | An optical investigation of implantation damage as GaAs superlattices |
| title_short | An optical investigation of implantation damage as GaAs superlattices |
| title_sort | optical investigation of implantation damage as gaas superlattices |
| topic | Superlattices as materials Hydrogen ion concentration Photoluminescence Raman effect Doped semiconductor superlattices UCTD |
| url | http://hdl.handle.net/2263/24151 http://upetd.up.ac.za/thesis/available/etd-04262005-121141/ |