{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/31322"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/31322","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Fully coupled electrical and optical simulation of vertical cavity surface emitting lasers","abstract":"The two-dimensional quantum well laser simulator MINILASE has been extended in several ways. First, the underlying device equations have been modified to accommodate the cylindrical geometry of vertical cavity surface emitting lasers (VCSELs). Second, an accurate band structure using the well-known k · p method, altered to include various external potentials, has been added in a fully self-consistent manner. The k · p method also yields the envelope functions within the quantum well which are used to compute the optical coupling strengths between electrons and holes in various subbands. It is shown that inclusion of an accurate bandstructure is important for obtaining correct laser output characteristics such as the modulation response. Finally, a fast new Green's function based optical solver (VMS) has been included self-consistently within MINILASE. The speed of VMS allows for direct inclusion within a Newton-Raphson iteration scheme that is performed very frequently during the simulation. VMS takes as input the change in the dielectric function computed within MINILASE and returns the optical recombination rates and net modal gain as outputs. The theory underlying VMS is presented as well as a detailed description of its coupling with MINILASE. To this end, a (quasi) photon rate equation that describes the dynamic behavior of the optical modes is derived. Finally, results related to the comprehensive coupling scheme are presented. For example, it is shown that the benefits of a tapered oxide aperture postulated to reduce threshold are negligible. Also demonstrated are the detrimental effects of spatial hole burning (an effect of minimal importance in traditional edge-emitting lasers) and vertical carrier leakage on the small signal response.","abstract_html":"The two-dimensional quantum well laser simulator MINILASE has been extended in several ways. First, the underlying device equations have been modified to accommodate the cylindrical geometry of vertical cavity surface emitting lasers (VCSELs). Second, an accurate band structure using the well-known k · p method, altered to include various external potentials, has been added in a fully self-consistent manner. The k · p method also yields the envelope functions within the quantum well which are used to compute the optical coupling strengths between electrons and holes in various subbands. It is shown that inclusion of an accurate bandstructure is important for obtaining correct laser output characteristics such as the modulation response. Finally, a fast new Green's function based optical solver (VMS) has been included self-consistently within MINILASE. The speed of VMS allows for direct inclusion within a Newton-Raphson iteration scheme that is performed very frequently during the simulation. VMS takes as input the change in the dielectric function computed within MINILASE and returns the optical recombination rates and net modal gain as outputs. The theory underlying VMS is presented as well as a detailed description of its coupling with MINILASE. To this end, a (quasi) photon rate equation that describes the dynamic behavior of the optical modes is derived. Finally, results related to the comprehensive coupling scheme are presented. For example, it is shown that the benefits of a tapered oxide aperture postulated to reduce threshold are negligible. Also demonstrated are the detrimental effects of spatial hole burning (an effect of minimal importance in traditional edge-emitting lasers) and vertical carrier leakage on the small signal response.","abstract_has_math":false,"creators":["Oyafuso, Fabiano A."],"institution":null,"degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Physics","degree_department":null,"school":null,"contributors":["Hess, Karl"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2012,"date_issued":"2012-06-01T18:28:42Z","date_published":"2012-06-01T18:28:42Z","updated_at":"2026-07-22T22:25:30Z","subjects":["Laser","vertical cavity surface emitting lasers (VCSELs)","quantum well laser simulator","MINILASE"],"languages":["en"],"rights":["©2001 Fabiano A. Oyafuso"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["4377353"],"render_values":[{"text":"4377353","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/31322","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Hess, Karl"]},{"key":"dc:creator","label":"Author","values":["Oyafuso, Fabiano A."]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2012-06-01T18:28:42Z","10000-01-01","2001"]},{"key":"dc:type","label":"Dc Type","values":["Dissertation / Thesis","text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Physics"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Laser","vertical cavity surface emitting lasers (VCSELs)","quantum well laser simulator","MINILASE"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["©2001 Fabiano A. Oyafuso"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["4377353","http://hdl.handle.net/2142/31322"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The two-dimensional quantum well laser simulator MINILASE has been extended in several ways. First, the underlying device equations have been modified to accommodate the cylindrical geometry of vertical cavity surface emitting lasers (VCSELs). Second, an accurate band structure using the well-known k · p method, altered to include various external potentials, has been added in a fully self-consistent manner. The k · p method also yields the envelope functions within the quantum well which are used to compute the optical coupling strengths between electrons and holes in various subbands. It is shown that inclusion of an accurate bandstructure is important for obtaining correct laser output characteristics such as the modulation response. Finally, a fast new Green's function based optical solver (VMS) has been included self-consistently within MINILASE. The speed of VMS allows for direct inclusion within a Newton-Raphson iteration scheme that is performed very frequently during the simulation. VMS takes as input the change in the dielectric function computed within MINILASE and returns the optical recombination rates and net modal gain as outputs. The theory underlying VMS is presented as well as a detailed description of its coupling with MINILASE. To this end, a (quasi) photon rate equation that describes the dynamic behavior of the optical modes is derived. Finally, results related to the comprehensive coupling scheme are presented. For example, it is shown that the benefits of a tapered oxide aperture postulated to reduce threshold are negligible. Also demonstrated are the detrimental effects of spatial hole burning (an effect of minimal importance in traditional edge-emitting lasers) and vertical carrier leakage on the small signal response.","Submitted by Elizabeth Kent (eckent2@illinois.edu) on 2012-06-01T18:28:42Z No. of bitstreams: 1 2001_oyafuso.pdf: 2420480 bytes, checksum: 5c80be2c0fe82e42549539a1cb2737ab (MD5)","Made available in DSpace on 2012-06-01T18:28:42Z (GMT). No. of bitstreams: 1 2001_oyafuso.pdf: 2420480 bytes, checksum: 5c80be2c0fe82e42549539a1cb2737ab (MD5) Previous issue date: 2001","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Elizabeth Kent (eckent2@illinois.edu) on 2012-06-01T18:28:43Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:10:50-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: thesis","thesis","U of I Only"]},{"key":"dc:title","label":"Title","values":["Fully coupled electrical and optical simulation of vertical cavity surface emitting lasers"]}]}],"canonical_facts":{"dc:contributor":["Hess, Karl"],"dc:creator":["Oyafuso, Fabiano A."],"dc:date":["2012-06-01T18:28:42Z","10000-01-01","2001"],"dc:description":["The two-dimensional quantum well laser simulator MINILASE has been extended in several ways. First, the underlying device equations have been modified to accommodate the cylindrical geometry of vertical cavity surface emitting lasers (VCSELs). Second, an accurate band structure using the well-known k · p method, altered to include various external potentials, has been added in a fully self-consistent manner. The k · p method also yields the envelope functions within the quantum well which are used to compute the optical coupling strengths between electrons and holes in various subbands. It is shown that inclusion of an accurate bandstructure is important for obtaining correct laser output characteristics such as the modulation response. Finally, a fast new Green's function based optical solver (VMS) has been included self-consistently within MINILASE. The speed of VMS allows for direct inclusion within a Newton-Raphson iteration scheme that is performed very frequently during the simulation. VMS takes as input the change in the dielectric function computed within MINILASE and returns the optical recombination rates and net modal gain as outputs. The theory underlying VMS is presented as well as a detailed description of its coupling with MINILASE. To this end, a (quasi) photon rate equation that describes the dynamic behavior of the optical modes is derived. Finally, results related to the comprehensive coupling scheme are presented. For example, it is shown that the benefits of a tapered oxide aperture postulated to reduce threshold are negligible. Also demonstrated are the detrimental effects of spatial hole burning (an effect of minimal importance in traditional edge-emitting lasers) and vertical carrier leakage on the small signal response.","Submitted by Elizabeth Kent (eckent2@illinois.edu) on 2012-06-01T18:28:42Z No. of bitstreams: 1 2001_oyafuso.pdf: 2420480 bytes, checksum: 5c80be2c0fe82e42549539a1cb2737ab (MD5)","Made available in DSpace on 2012-06-01T18:28:42Z (GMT). No. of bitstreams: 1 2001_oyafuso.pdf: 2420480 bytes, checksum: 5c80be2c0fe82e42549539a1cb2737ab (MD5) Previous issue date: 2001","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Elizabeth Kent (eckent2@illinois.edu) on 2012-06-01T18:28:43Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:10:50-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: thesis","thesis","U of I Only"],"dc:identifier":["4377353","http://hdl.handle.net/2142/31322"],"dc:language":["en"],"dc:rights":["©2001 Fabiano A. Oyafuso"],"dc:subject":["Laser","vertical cavity surface emitting lasers (VCSELs)","quantum well laser simulator","MINILASE"],"dc:title":["Fully coupled electrical and optical simulation of vertical cavity surface emitting lasers"],"dc:type":["Dissertation / Thesis","text"],"thesis:degree_discipline":["Physics"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."]},"updated_at":"2026-07-22T22:25:30Z"}