{"id":{"repo_id":"uiuc","oai_identifier":"oai:www.ideals.illinois.edu:2142/22033"},"canonical_url":"https://search.dev.ndltd.org/etd/uiuc/oai:www.ideals.illinois.edu:2142/22033","repository":{"repo_id":"uiuc","name":"University of Illinois - Urbana-Champaign","base_url":"https://www.ideals.illinois.edu/oai-pmh"},"display":{"title":"Femtosecond laser studies of molecular wavepacket dynamics in the cesium dimer","abstract":"Femtosecond laser pump-probe experiments have been applied to the study of vibrational wavepacket dynamics in the excited states of the cesium dimer, Cs$\\sb2.$ The real-time vibrational motion of the molecule is observed by probing the quantum motion of the wavepacket on a potential surface by a pair of time-delayed ultrafast laser pulses. Specifically, pumping the $\\rm C(\\sp1\\Pi\\sb{u})\\gets X(\\sp1\\Sigma\\sb{g}\\sp+)\\ Cs\\sb2$ band at several wavelengths between 627 nm and 650 nm produces a wavepacket with an oscillation period of $\\sim$1.15 psec. The wavepacket is detected by photoionizing the excited molecule with a time-delayed probe pulse. The wavepacket oscillations persist for approximately 20 psec, and their decay is attributed to the dephasing of the vibrational wavefunctions that comprise the wavepacket.","abstract_html":"Femtosecond laser pump-probe experiments have been applied to the study of vibrational wavepacket dynamics in the excited states of the cesium dimer, Cs$\\sb2.$ The real-time vibrational motion of the molecule is observed by probing the quantum motion of the wavepacket on a potential surface by a pair of time-delayed ultrafast laser pulses. Specifically, pumping the <span class=\"etd-inline-math\">\\rm C(\\sp1\\Pi\\sb{u})\\gets X(\\sp1\\Sigma\\sb{g}\\sp+) Cs\\sb2</span> band at several wavelengths between 627 nm and 650 nm produces a wavepacket with an oscillation period of $\\sim$1.15 psec. The wavepacket is detected by photoionizing the excited molecule with a time-delayed probe pulse. The wavepacket oscillations persist for approximately 20 psec, and their decay is attributed to the dephasing of the vibrational wavefunctions that comprise the wavepacket.","abstract_has_math":true,"creators":["Rodriguez, George"],"institution":"University of Illinois at Urbana-Champaign","degree_name":"Ph.D.","degree_level":"Dissertation","degree_discipline":"Electrical Engineering","degree_department":null,"school":null,"contributors":["Eden, James G."],"advisors":[],"committee_chairs":[],"committee_members":[],"year":2011,"date_issued":"2011-05-07T13:26:48Z","date_published":"2011-05-07T13:26:48Z","updated_at":"2026-07-22T22:25:19Z","subjects":["Chemistry, Physical","Physics, Molecular","Physics, Optics"],"languages":["eng"],"rights":["Copyright 1993 Rodriguez, George"],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9314931","(UMI)AAI9314931"],"render_values":[{"text":"AAI9314931","href":null,"code":true},{"text":"(UMI)AAI9314931","href":null,"code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/2142/22033","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor","label":"Contributor","values":["Eden, James G."]},{"key":"dc:creator","label":"Author","values":["Rodriguez, George"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["2011-05-07T13:26:48Z","10000-01-01","1993"]},{"key":"dc:type","label":"Dc Type","values":["text"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical Engineering"]},{"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":["Chemistry, Physical","Physics, Molecular","Physics, Optics"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["eng"]},{"key":"dc:rights","label":"Dc Rights","values":["Copyright 1993 Rodriguez, George"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["AAI9314931","(UMI)AAI9314931","http://hdl.handle.net/2142/22033"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["Femtosecond laser pump-probe experiments have been applied to the study of vibrational wavepacket dynamics in the excited states of the cesium dimer, Cs$\\sb2.$ The real-time vibrational motion of the molecule is observed by probing the quantum motion of the wavepacket on a potential surface by a pair of time-delayed ultrafast laser pulses. Specifically, pumping the $\\rm C(\\sp1\\Pi\\sb{u})\\gets X(\\sp1\\Sigma\\sb{g}\\sp+)\\ Cs\\sb2$ band at several wavelengths between 627 nm and 650 nm produces a wavepacket with an oscillation period of $\\sim$1.15 psec. The wavepacket is detected by photoionizing the excited molecule with a time-delayed probe pulse. The wavepacket oscillations persist for approximately 20 psec, and their decay is attributed to the dephasing of the vibrational wavefunctions that comprise the wavepacket.","Using the Fast Fourier Transform (FFT) spectral method, numerical quantum calculations of the time dependent Schrodinger equation have been performed to simulate the time evolution of the wavepacket density. The wavepacket simulations reproduce the experimentally observed oscillations, and can be used to describe the classical motion of the molecule.","Made available in DSpace on 2011-05-07T13:26:48Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9314931.pdf: 4198402 bytes, checksum: 10f1a2ea8fd2cbc114954fa475c9073b (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:54:52Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:25:32-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"]},{"key":"dc:title","label":"Title","values":["Femtosecond laser studies of molecular wavepacket dynamics in the cesium dimer"]}]}],"canonical_facts":{"dc:contributor":["Eden, James G."],"dc:creator":["Rodriguez, George"],"dc:date":["2011-05-07T13:26:48Z","10000-01-01","1993"],"dc:description":["Femtosecond laser pump-probe experiments have been applied to the study of vibrational wavepacket dynamics in the excited states of the cesium dimer, Cs$\\sb2.$ The real-time vibrational motion of the molecule is observed by probing the quantum motion of the wavepacket on a potential surface by a pair of time-delayed ultrafast laser pulses. Specifically, pumping the $\\rm C(\\sp1\\Pi\\sb{u})\\gets X(\\sp1\\Sigma\\sb{g}\\sp+)\\ Cs\\sb2$ band at several wavelengths between 627 nm and 650 nm produces a wavepacket with an oscillation period of $\\sim$1.15 psec. The wavepacket is detected by photoionizing the excited molecule with a time-delayed probe pulse. The wavepacket oscillations persist for approximately 20 psec, and their decay is attributed to the dephasing of the vibrational wavefunctions that comprise the wavepacket.","Using the Fast Fourier Transform (FFT) spectral method, numerical quantum calculations of the time dependent Schrodinger equation have been performed to simulate the time evolution of the wavepacket density. The wavepacket simulations reproduce the experimentally observed oscillations, and can be used to describe the classical motion of the molecule.","Made available in DSpace on 2011-05-07T13:26:48Z (GMT). No. of bitstreams: 2 license.txt: 4922 bytes, checksum: 910b249b4beec47e7ab768910c8f966f (MD5) 9314931.pdf: 4198402 bytes, checksum: 10f1a2ea8fd2cbc114954fa475c9073b (MD5) Previous issue date: 1993","Item marked as restricted to the 'UIUC Users [automated]' Group (id=2) by Howard Ding (hding2@illinois.edu) on 2011-05-07T14:54:52Z Item is restricted indefinitely.","Restriction data tranferred 2014-07-01T11:25:32-05:00 Original Data Group with Access UIUC Users [automated] Release Date: none Reason: ETDs are only available to UIUC Users without author permission","ETDs are only available to UIUC Users without author permission","U of I Only"],"dc:identifier":["AAI9314931","(UMI)AAI9314931","http://hdl.handle.net/2142/22033"],"dc:language":["eng"],"dc:rights":["Copyright 1993 Rodriguez, George"],"dc:subject":["Chemistry, Physical","Physics, Molecular","Physics, Optics"],"dc:title":["Femtosecond laser studies of molecular wavepacket dynamics in the cesium dimer"],"dc:type":["text"],"thesis:degree_discipline":["Electrical Engineering"],"thesis:degree_level":["Dissertation"],"thesis:degree_name":["Ph.D."],"thesis:institution_name":["University of Illinois at Urbana-Champaign"]},"updated_at":"2026-07-22T22:25:19Z"}