{"id":2682,"date":"2011-05-04T14:14:00","date_gmt":"2011-05-04T12:14:00","guid":{"rendered":"https:\/\/forschungsnetzwerk-chim.de\/?post_type=publikationen&#038;p=2682"},"modified":"2024-01-24T17:37:19","modified_gmt":"2024-01-24T16:37:19","slug":"influence-of-exciton-phonon-coupling-and-strain-on-the-anisotropic-optical-response-of-wurtzite-aln-around-the-band-edge","status":"publish","type":"publikationen","link":"https:\/\/forschungsnetzwerk-chim.de\/en\/publications\/influence-of-exciton-phonon-coupling-and-strain-on-the-anisotropic-optical-response-of-wurtzite-aln-around-the-band-edge\/","title":{"rendered":"Influence of exciton-phonon coupling and strain on the anisotropic optical response of wurtzite AlN around the band edge"},"content":{"rendered":"\n<p>The optical properties around the absorption edge of high-quality wurtzite c-plane AlN layers are investigated by spectroscopic ellipsometry focusing on the anisotropy of the optical response. The spectral dependence of dielectric function shows a strong contribution of exciton-phonon coupling superimposed to the exciton continuum. Crystal field splitting and spin-orbit coupling energies are found to be \u0394cf=\u2212212 meV and \u0394so=16 meV, respectively. These values are accessible because our data allow extraction of the transition energies of excitons with holes from all three highest valence bands. Energy positions are cross-checked by photoluminescence measurements. As the samples are grown on different substrates and exhibit varying biaxial strain determined by high resolution x-ray diffraction, we are also able to determine the deformation potentials a\u2212D1=\u22126.9 eV, a\u2212D2=\u221215.2 eV, D3=8.3 eV, and D4=\u22124.15 eV for AlN.<\/p>\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p><b>Publication:<\/b> 2011<\/p>\n","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"beteiligte":[],"class_list":["post-2682","publikationen","type-publikationen","status-publish","hentry","publikationen_category-physical-chemistry"],"acf":[],"_links":{"self":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/publikationen\/2682","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/publikationen"}],"about":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/types\/publikationen"}],"wp:attachment":[{"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/media?parent=2682"}],"wp:term":[{"taxonomy":"beteiligte","embeddable":true,"href":"https:\/\/forschungsnetzwerk-chim.de\/en\/wp-json\/wp\/v2\/beteiligte?post=2682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}