Designing a single photon modulator using surface acoustic waves on ZnO thin film
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Authors
Sakhnini, Hala
Date
2024-12-05
Type
thesis
Language
eng
Keyword
surface acoustic waves , single photon , quantum dot , nanowire
Alternative Title
Abstract
Quantum dots embedded in a free standing nanowire have been shown to be a quality single photon emitter. However, electrical modulation is complex for these structures and remains to be a complication. Instead, acoustic modulation using surface acoustic waves to modulate the wires is proposed. As part of this design, the vibrational modes of the nanowire must be coupled to an acoustic transducer. To that end, the eigenfrequency of the nanowires are modelled via COMSOL Multiphysics to determine what acoustic wave is required for coupling. The parameters of the interdigital transducers on a ZnO piezoelectric film are also modelled via COMSOL Multiphysics to determine what the design requirements are for producing the appropriate acoustic wave. Once the frequency domains are identified, the acoustic device is fabricated at NFK using positive liftoff process. The transducers are tested using a network analyzer and probe station, as well as a Sagnac interferometry. An etching process is tested to determine a method of etching the ZnO layer to expose the underneath area for nanowire growth. The successful design is then ready to be reproduced on an InP nanowire sample to incorporate the ability for acoustic modulation.
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Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
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Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.
ProQuest PhD and Master's Theses International Dissemination Agreement
Intellectual Property Guidelines at Queen's University
Copying and Preserving Your Thesis
This publication is made available by the authority of the copyright owner solely for the purpose of private study and research and may not be copied or reproduced except as permitted by the copyright laws without written authority from the copyright owner.