Towards Coherent Control of Current Injection in Graphene via Quantum Interference in Charge Carrier Excitations
Loading...
Authors
Antonio Chi, Braulio Farid
Date
2025-03-28
Type
thesis
Language
eng
Keyword
Physics , Photonics , Coherent control , Graphene , Nonlinear optics , Light-matter interactions
Alternative Title
Abstract
This thesis investigates the coherent control of photocurrent generation in graphene through interband transitions, utilizing femtosecond laser pulses at room temperature. We developed and characterized graphene field e!ect transistors (GFETs) using three distinct fabrication methods, culminating in a fully PCB-mounted device for optoelectronic measurements. Physical and chemical characterization of the devices, including AFM, voltage-current measurements, and X-ray surface analysis, confirmed the presence of single layer graphene with an average sheet resistance of 4kOhms. Using a custom-built two-colored Michelson interferometer, we demonstrated its capability to perform interferometric measurements of E^2ω E2ω fields, employing harmonically related beams at ωω = 808nm and ω2ω = 404nm. While the setup successfully detected voltage signals of approximately 600µV from the graphene devices, the targeted current injection phenomenon was not observed. These results provide valuable insights into the experimental challenges and requirements for achieving coherent control of current injection in graphene-based devices.
Description
Citation
Publisher
License
Queen's University's Thesis/Dissertation Non-Exclusive License for Deposit to QSpace and Library and Archives Canada
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.
Attribution-NoDerivatives 4.0 International
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.
Attribution-NoDerivatives 4.0 International