Ultrafast optical nonlinearities in aluminum phthalocyanine organic thin films and a picosecond all-optical organic etalon switch.

Persistent Link:
http://hdl.handle.net/10150/185456
Title:
Ultrafast optical nonlinearities in aluminum phthalocyanine organic thin films and a picosecond all-optical organic etalon switch.
Author:
Williams, Valorie Sharron
Issue Date:
1991
Publisher:
The University of Arizona.
Rights:
Copyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
Abstract:
The history of femtosecond laser pulse generation is summarized and a current state-of-the-art femtosecond laser system described. The femtosecond pulses are used to observe coherent coupling effects in a fluoro-aluminum phthalocyanine thin film. The polarization dependency of the coherent coupling indicates that orthogonal polarization states in the phthalocyanine ring are effectively uncoupled. The coherent coupling effect evolves into a nonequilibrium exciton population spectrally coincident with the pump pulse. This population rapidly decays to the bottom of the π- π* absorption band. These singlet excitons exhibit rapid bimolecular decay characteristics. In addition, some singlet excitons relax into the triplet manifold by intersystem crossing. Excited-state triplet-triplet absorption is then observed. The triplet excitons relax to the ground state, apparently via nonradiative decay mechanisms. Femtosecond techniques are also employed to demonstrate a picosecond all-optical organic NOR gate. A dye-doped polymer is used as the nonlinear material inside a Fabry-Perot etalon.
Type:
text; Dissertation-Reproduction (electronic)
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Optical Sciences; Graduate College
Degree Grantor:
University of Arizona
Advisor:
Peyghambarian, Nasser

Full metadata record

DC FieldValue Language
dc.language.isoenen_US
dc.titleUltrafast optical nonlinearities in aluminum phthalocyanine organic thin films and a picosecond all-optical organic etalon switch.en_US
dc.creatorWilliams, Valorie Sharronen_US
dc.contributor.authorWilliams, Valorie Sharronen_US
dc.date.issued1991en_US
dc.publisherThe University of Arizona.en_US
dc.rightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction or presentation (such as public display or performance) of protected items is prohibited except with permission of the author.en_US
dc.description.abstractThe history of femtosecond laser pulse generation is summarized and a current state-of-the-art femtosecond laser system described. The femtosecond pulses are used to observe coherent coupling effects in a fluoro-aluminum phthalocyanine thin film. The polarization dependency of the coherent coupling indicates that orthogonal polarization states in the phthalocyanine ring are effectively uncoupled. The coherent coupling effect evolves into a nonequilibrium exciton population spectrally coincident with the pump pulse. This population rapidly decays to the bottom of the π- π* absorption band. These singlet excitons exhibit rapid bimolecular decay characteristics. In addition, some singlet excitons relax into the triplet manifold by intersystem crossing. Excited-state triplet-triplet absorption is then observed. The triplet excitons relax to the ground state, apparently via nonradiative decay mechanisms. Femtosecond techniques are also employed to demonstrate a picosecond all-optical organic NOR gate. A dye-doped polymer is used as the nonlinear material inside a Fabry-Perot etalon.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineOptical Sciencesen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorPeyghambarian, Nasseren_US
dc.contributor.committeememberSarid, Droren_US
dc.contributor.committeememberArmstrong, Neal R.en_US
dc.contributor.committeememberMazumdar, Sumiten_US
dc.contributor.committeememberLindberg, Markusen_US
dc.identifier.proquest9124164en_US
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