{"id":{"repo_id":"vcu","oai_identifier":"oai:scholarscompass.vcu.edu:etd-2001"},"canonical_url":"https://search.dev.ndltd.org/etd/vcu/oai:scholarscompass.vcu.edu:etd-2001","repository":{"repo_id":"vcu","name":"Virginia Commonwealth University","base_url":"https://scholarscompass.vcu.edu/do/oai/"},"display":{"title":"Determination of the Band Gap Bowing Parameter of A1xGa1-xN with Contactless Electroreflectance","abstract":"Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the trend for the detectable C exciton transitions. The slope of the linear trendlines for the A and C exciton were practically the same.","abstract_html":"Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the trend for the detectable C exciton transitions. The slope of the linear trendlines for the A and C exciton were practically the same.","abstract_has_math":false,"creators":["McGlinchey, Laura C."],"institution":null,"degree_name":"Master of Science","degree_level":"Thesis","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Dr. Martin Muñoz"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2006,"date_issued":"2006-01-01T08:00:00Z","date_published":"2006-01-01T08:00:00Z","updated_at":"2026-07-24T05:54:40Z","subjects":["AlN","composition","exciton transitions","modulation spectroscopy","Physical Sciences and Mathematics","Physics"],"languages":[],"rights":["© The Author"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["https://scholarscompass.vcu.edu/etd/1002"],"render_values":[{"text":"https://scholarscompass.vcu.edu/etd/1002","href":"https://scholarscompass.vcu.edu/etd/1002","code":true}]}]},"links":{"outbound_url":"https://doi.org/10.25772/BJC4-R640","outbound_label":"DOI","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Dr. Martin Muñoz"]},{"key":"dc:creator","label":"Author","values":["McGlinchey, Laura C."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.available","label":"Dc Date Available","values":["2014-07-09T07:00:00Z"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Thesis"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Master of Science"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["AlN","composition","exciton transitions","modulation spectroscopy","Physical Sciences and Mathematics","Physics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:rights","label":"Dc Rights","values":["© The Author"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["https://doi.org/10.25772/BJC4-R640","https://scholarscompass.vcu.edu/etd/1002"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description.abstract","label":"Abstract","values":["Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the trend for the detectable C exciton transitions. The slope of the linear trendlines for the A and C exciton were practically the same."]},{"key":"dc:title","label":"Title","values":["Determination of the Band Gap Bowing Parameter of A1xGa1-xN with Contactless Electroreflectance"]}]}],"canonical_facts":{"dc:contributor":["Dr. Martin Muñoz"],"dc:creator":["McGlinchey, Laura C."],"dc:date.available":["2014-07-09T07:00:00Z"],"dc:description.abstract":["Contactless electroreflectance (CER), a modulation spectroscopy (MS) technique, has been used to study the A and C exciton transitions in A1xGa1-xN layers for a composition range of 0 ≤ x ≤ 0.48 at room temperature. Taking the entire composition range (0 ≤ x ≤ 1) into account by incorporating a previously reported band gap energy for AlN, the dependence of the A-exciton transition on composition showed a downward bowing from linearity. A bowing parameter of b = 1.7 eV was found. Analysis of the lower composition range 0 ≤ x ≤ 0.48 resulted in a linear fit, as did the trend for the detectable C exciton transitions. The slope of the linear trendlines for the A and C exciton were practically the same."],"dc:identifier":["https://doi.org/10.25772/BJC4-R640","https://scholarscompass.vcu.edu/etd/1002"],"dc:rights":["© The Author"],"dc:subject":["AlN","composition","exciton transitions","modulation spectroscopy","Physical Sciences and Mathematics","Physics"],"dc:title":["Determination of the Band Gap Bowing Parameter of A1xGa1-xN with Contactless Electroreflectance"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Thesis"],"thesis:degree_name":["Master of Science"]},"updated_at":"2026-07-24T05:54:40Z"}