dc.contributor.author | Samiezadeh, Sohrab | |
dc.date.accessioned | 2022-04-29 20:15:42 (GMT) | |
dc.date.available | 2022-04-29 20:15:42 (GMT) | |
dc.date.issued | 2022-04-29 | |
dc.date.submitted | 2022-04-19 | |
dc.identifier.uri | http://hdl.handle.net/10012/18209 | |
dc.description.abstract | The 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.iso | en | en |
dc.publisher | University of Waterloo | en |
dc.title | Integrated Photonics Structure for THz Systems Based on Silicon and Photoconductive Material | en |
dc.type | Master Thesis | en |
dc.pending | false | |
uws-etd.degree.department | Electrical and Computer Engineering | en |
uws-etd.degree.discipline | Electrical and Computer Engineering | en |
uws-etd.degree.grantor | University of Waterloo | en |
uws-etd.degree | Master of Applied Science | en |
uws-etd.embargo.terms | 0 | en |
uws.contributor.advisor | Safavi-Naeini, Safieddin (Ali) | |
uws.contributor.advisor | Majedi, Hamed | |
uws.contributor.affiliation1 | Faculty of Engineering | en |
uws.published.city | Waterloo | en |
uws.published.country | Canada | en |
uws.published.province | Ontario | en |
uws.typeOfResource | Text | en |
uws.peerReviewStatus | Unreviewed | en |
uws.scholarLevel | Graduate | en |