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dc.contributor.authorSamiezadeh, Sohrab
dc.date.accessioned2022-04-29 20:15:42 (GMT)
dc.date.available2022-04-29 20:15:42 (GMT)
dc.date.issued2022-04-29
dc.date.submitted2022-04-19
dc.identifier.urihttp://hdl.handle.net/10012/18209
dc.description.abstractThe field of terahertz (THz) technology has been immensely progressed over the past two decades, but integrated on-chip THz circuits and systems are still under development. This thesis is an effort to propose an integrated THz system by trapping a generated photocurrent THz wave and its coupling to the waveguide for on-chip propagation and processing. The proposed system consists of three parts; an optically-excited photoconductive THz source based on low-temperature grown (LT)-GaAs, a photonic crystal nanobeam cavity for THz wave confinement, and its coupling to a waveguide, both are based on a silicon platform. The thesis first investigates how the THz signal is generated by the photomixing techniques. It presents an analytical model to calculate the time-varying photocurrent acting as a THz source. Considering the THz dipole current exciting a cavity, I propose a photonic crystal nanobeam cavity inside a waveguide with high quality factor to confine the THz wave. The design and simulation of such a cavity are presented where the THz field mode has been found in a single-mode regime. Finally, the cavity is coupled to the waveguide using a tapering technique in the photonic crystal structure for efficient coupling and subsequent propagation by modal field matching. The proposed structure exhibits potential applications for integrated THz sources for various on-chip applications such as sensing, spectroscopy, and signal processing.en
dc.language.isoenen
dc.publisherUniversity of Waterlooen
dc.titleIntegrated Photonics Structure for THz Systems Based on Silicon and Photoconductive Materialen
dc.typeMaster Thesisen
dc.pendingfalse
uws-etd.degree.departmentElectrical and Computer Engineeringen
uws-etd.degree.disciplineElectrical and Computer Engineeringen
uws-etd.degree.grantorUniversity of Waterlooen
uws-etd.degreeMaster of Applied Scienceen
uws-etd.embargo.terms0en
uws.contributor.advisorSafavi-Naeini, Safieddin (Ali)
uws.contributor.advisorMajedi, Hamed
uws.contributor.affiliation1Faculty of Engineeringen
uws.published.cityWaterlooen
uws.published.countryCanadaen
uws.published.provinceOntarioen
uws.typeOfResourceTexten
uws.peerReviewStatusUnrevieweden
uws.scholarLevelGraduateen


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