Design and modeling of grating-assisted devices for microwave and optical applications

Persistent Link:
http://hdl.handle.net/10150/282414
Title:
Design and modeling of grating-assisted devices for microwave and optical applications
Author:
Liang, Tao
Issue Date:
1997
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:
Grating structures have found applications in microwave, millimeter wave, and optical devices and systems. While analytical methods can handle infinite, periodic gratings well, numerical methods usually are needed for general finite and/or aperiodic gratings. We have carried out numerical investigations of a number of grating structures with the finite-difference time-domain approach (FDTD). This approach is selected because of its ability to model complex structures and materials. Some of the many grating applications we investigated include gratings that can be used in waveguide environments as output couplers to transfer guided wave energy into radiation fields which propagate into predefined directions, as mode converters to convert energy between various modes in the same waveguide, or as directional couplers to transfer energy between different waveguides. Optical switching is also shown to be achievable and an efficient WDM demultiplexer is proposed and analyzed. The performance of grating assisted couplers in the presence of dispersive materials is also characterized. We have shown that the FDTD simulator is very effective in modeling complicated grating structures. Novel device features and operating behaviors have been revealed through its use. These results and observations provide insight and guidelines for the future design of various other grating assisted devices.
Type:
text; Dissertation-Reproduction (electronic)
Keywords:
Engineering, Electronics and Electrical.
Degree Name:
Ph.D.
Degree Level:
doctoral
Degree Program:
Graduate College; Electrical and Computer Engineering
Degree Grantor:
University of Arizona
Advisor:
Ziolkowski, Richard W.

Full metadata record

DC FieldValue Language
dc.language.isoen_USen_US
dc.titleDesign and modeling of grating-assisted devices for microwave and optical applicationsen_US
dc.creatorLiang, Taoen_US
dc.contributor.authorLiang, Taoen_US
dc.date.issued1997en_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.abstractGrating structures have found applications in microwave, millimeter wave, and optical devices and systems. While analytical methods can handle infinite, periodic gratings well, numerical methods usually are needed for general finite and/or aperiodic gratings. We have carried out numerical investigations of a number of grating structures with the finite-difference time-domain approach (FDTD). This approach is selected because of its ability to model complex structures and materials. Some of the many grating applications we investigated include gratings that can be used in waveguide environments as output couplers to transfer guided wave energy into radiation fields which propagate into predefined directions, as mode converters to convert energy between various modes in the same waveguide, or as directional couplers to transfer energy between different waveguides. Optical switching is also shown to be achievable and an efficient WDM demultiplexer is proposed and analyzed. The performance of grating assisted couplers in the presence of dispersive materials is also characterized. We have shown that the FDTD simulator is very effective in modeling complicated grating structures. Novel device features and operating behaviors have been revealed through its use. These results and observations provide insight and guidelines for the future design of various other grating assisted devices.en_US
dc.typetexten_US
dc.typeDissertation-Reproduction (electronic)en_US
dc.subjectEngineering, Electronics and Electrical.en_US
thesis.degree.namePh.D.en_US
thesis.degree.leveldoctoralen_US
thesis.degree.disciplineGraduate Collegeen_US
thesis.degree.disciplineElectrical and Computer Engineeringen_US
thesis.degree.grantorUniversity of Arizonaen_US
dc.contributor.advisorZiolkowski, Richard W.en_US
dc.identifier.proquest9806797en_US
dc.identifier.bibrecord.b37541328en_US
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