{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/106485"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/106485","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Diatomic excimer dynamics in microplasma lamps and alkali lasers","abstract":"The dynamics of diatomic excimers - electronically excited molecules having dissociative ground states - generated in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas and He2 molecules that are of considerable interest as efficient near-infrared lasers, or as the energy source for driving the Hg+ vacuum-ultraviolet lamp (194.2 nm). The photoassociation and subsequent stimulated emission of cesium (Cs) - rare gas (Ar or Xe) pairs were examined by laser pump-probe experiments, and an optical-to-optical energy conversion efficiency of ~28% was observed when Cs-Ar pairs were pumped at 836.7 nm and stimulated emission occurs at 852.2 nm. By comparing full quantum simulations of Cs-Xe photoassociation to the gain spectrum of Cs-Xe in the red satellite of the Cs D2 line, it is shown that the structure of weakly bound Cs-Xe molecules (including the dissociation energy), correlated with Cs(62P3/2) + Xe(5p6 1S0) in the separated atom limit, can be determined with precision. Extensive studies of time-resolved emission from the Hg+ ion in electrically driven microplasma lamps show that the Hg+ line at 194.2 nm is pumped efficiently by Penning ionization of the Hg atom by metastable helium molecules. Experimental results as well as zero-dimensional kinetic simulations support the validity of the proposed kinetic pathway.","abstract_html":"The dynamics of diatomic excimers - electronically excited molecules having dissociative ground states - generated in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas and He2 molecules that are of considerable interest as efficient near-infrared lasers, or as the energy source for driving the Hg+ vacuum-ultraviolet lamp (194.2 nm). The photoassociation and subsequent stimulated emission of cesium (Cs) - rare gas (Ar or Xe) pairs were examined by laser pump-probe experiments, and an optical-to-optical energy conversion efficiency of ~28% was observed when Cs-Ar pairs were pumped at 836.7 nm and stimulated emission occurs at 852.2 nm. By comparing full quantum simulations of Cs-Xe photoassociation to the gain spectrum of Cs-Xe in the red satellite of the Cs D2 line, it is shown that the structure of weakly bound Cs-Xe molecules (including the dissociation energy), correlated with Cs(62P3/2) + Xe(5p6 1S0) in the separated atom limit, can be determined with precision. Extensive studies of time-resolved emission from the Hg+ ion in electrically driven microplasma lamps show that the Hg+ line at 194.2 nm is pumped efficiently by Penning ionization of the Hg atom by metastable helium molecules. Experimental results as well as zero-dimensional kinetic simulations support the validity of the proposed kinetic pathway.","abstract_has_math":false,"creators":["Park, Sehyun"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical & Computer Engr","degree_department":null,"school":null,"contributors":["Eden, James Gary","Cunningham, Brian T","Li, Xiuling","Lorenz, Virginia","Curreli, Davide"],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2020,"date_issued":"2020-03-02T22:38:56Z","date_published":"2020-03-02T22:38:56Z","updated_at":"2026-07-22T22:24:47Z","subjects":["Excimer","Microplasmas","Alkali laser","Mercury ion","Helium molecule","Cs-Rg"],"languages":["en"],"rights":["Copyright 2019 Sehyun Park"],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"http://hdl.handle.net/2142/106485","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Eden, James Gary","Cunningham, Brian T","Li, Xiuling","Lorenz, Virginia","Curreli, Davide"]},{"key":"dc:creator","label":"Author","values":["Park, Sehyun"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2020-03-02T22:38:56Z","2022-03-03T10:15:22Z","2019-12-05","2019-12"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical & Computer Engr"]},{"key":"thesis:degree_level","label":"Degree Level","values":["Dissertation"]},{"key":"thesis:degree_name","label":"Degree Name","values":["Ph.D."]},{"key":"thesis:institution_name","label":"Thesis Institution Name","values":["University of Illinois at Urbana-Champaign"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["Excimer","Microplasmas","Alkali laser","Mercury ion","Helium molecule","Cs-Rg"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["en"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 2019 Sehyun Park"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["http://hdl.handle.net/2142/106485"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The dynamics of diatomic excimers - electronically excited molecules having dissociative ground states - generated in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas and He2 molecules that are of considerable interest as efficient near-infrared lasers, or as the energy source for driving the Hg+ vacuum-ultraviolet lamp (194.2 nm). The photoassociation and subsequent stimulated emission of cesium (Cs) - rare gas (Ar or Xe) pairs were examined by laser pump-probe experiments, and an optical-to-optical energy conversion efficiency of ~28% was observed when Cs-Ar pairs were pumped at 836.7 nm and stimulated emission occurs at 852.2 nm. By comparing full quantum simulations of Cs-Xe photoassociation to the gain spectrum of Cs-Xe in the red satellite of the Cs D2 line, it is shown that the structure of weakly bound Cs-Xe molecules (including the dissociation energy), correlated with Cs(62P3/2) + Xe(5p6 1S0) in the separated atom limit, can be determined with precision. Extensive studies of time-resolved emission from the Hg+ ion in electrically driven microplasma lamps show that the Hg+ line at 194.2 nm is pumped efficiently by Penning ionization of the Hg atom by metastable helium molecules. Experimental results as well as zero-dimensional kinetic simulations support the validity of the proposed kinetic pathway.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-12-01","The student, Sehyun Park, accepted the attached license on 2019-12-04 at 13:45.","The student, Sehyun Park, submitted this Dissertation for approval on 2019-12-04 at 14:05.","This Dissertation was approved for publication on 2019-12-05 at 07:58.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14692 on 2020-02-28 at 17:37:54","Made available in DSpace on 2020-03-02T22:38:56Z (GMT). No. of bitstreams: 2 PARK-DISSERTATION-2019.pdf: 4121693 bytes, checksum: 14d71a0580fad5a25a423d6f35bc5e23 (MD5) LICENSE.txt: 4208 bytes, checksum: d61169cdc0d0f9176d01baaf4de78dc5 (MD5) Previous issue date: 2019-12-05","Embargo set by: Seth Robbins for item 114029 Lift date: 2022-03-02T22:39:04Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 114029 on 2022-03-03T10:15:22Z."]},{"key":"dc:format","label":"Dc Format","values":["application/pdf"]},{"key":"dc:title","label":"Title","values":["Diatomic excimer dynamics in microplasma lamps and alkali lasers"]}]}],"canonical_facts":{"dc:contributor":["Eden, James Gary","Cunningham, Brian T","Li, Xiuling","Lorenz, Virginia","Curreli, Davide"],"dc:creator":["Park, Sehyun"],"dc:date":["2020-03-02T22:38:56Z","2022-03-03T10:15:22Z","2019-12-05","2019-12"],"dc:description":["The dynamics of diatomic excimers - electronically excited molecules having dissociative ground states - generated in alkali-rare gas mixtures and low temperature microplasmas have been pursued and the experimental and computational results are presented here. This work focuses on the Cs-rare gas and He2 molecules that are of considerable interest as efficient near-infrared lasers, or as the energy source for driving the Hg+ vacuum-ultraviolet lamp (194.2 nm). The photoassociation and subsequent stimulated emission of cesium (Cs) - rare gas (Ar or Xe) pairs were examined by laser pump-probe experiments, and an optical-to-optical energy conversion efficiency of ~28% was observed when Cs-Ar pairs were pumped at 836.7 nm and stimulated emission occurs at 852.2 nm. By comparing full quantum simulations of Cs-Xe photoassociation to the gain spectrum of Cs-Xe in the red satellite of the Cs D2 line, it is shown that the structure of weakly bound Cs-Xe molecules (including the dissociation energy), correlated with Cs(62P3/2) + Xe(5p6 1S0) in the separated atom limit, can be determined with precision. Extensive studies of time-resolved emission from the Hg+ ion in electrically driven microplasma lamps show that the Hg+ line at 194.2 nm is pumped efficiently by Penning ionization of the Hg atom by metastable helium molecules. Experimental results as well as zero-dimensional kinetic simulations support the validity of the proposed kinetic pathway.","Submission published under a 24 month embargo labeled 'Closed Access', the embargo will last until 2021-12-01","The student, Sehyun Park, accepted the attached license on 2019-12-04 at 13:45.","The student, Sehyun Park, submitted this Dissertation for approval on 2019-12-04 at 14:05.","This Dissertation was approved for publication on 2019-12-05 at 07:58.","DSpace SAF Submission Ingestion Package generated from Vireo submission #14692 on 2020-02-28 at 17:37:54","Made available in DSpace on 2020-03-02T22:38:56Z (GMT). No. of bitstreams: 2 PARK-DISSERTATION-2019.pdf: 4121693 bytes, checksum: 14d71a0580fad5a25a423d6f35bc5e23 (MD5) LICENSE.txt: 4208 bytes, checksum: d61169cdc0d0f9176d01baaf4de78dc5 (MD5) Previous issue date: 2019-12-05","Embargo set by: Seth Robbins for item 114029 Lift date: 2022-03-02T22:39:04Z Reason: Author requested closed access (OA after 2yrs) in Vireo ETD system","Limited Restriction Lifted for Item 114029 on 2022-03-03T10:15:22Z."],"dc:format":["application/pdf"],"dc:identifier":["http://hdl.handle.net/2142/106485"],"dc:language":["en"],"dc:rights":["Copyright 2019 Sehyun Park"],"dc:subject":["Excimer","Microplasmas","Alkali laser","Mercury ion","Helium molecule","Cs-Rg"],"dc:title":["Diatomic excimer dynamics in microplasma lamps and alkali lasers"],"dc:type":["text"],"thesis:degree_discipline":["Electrical & Computer Engr"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:24:47Z"}