{"id":{"repo_id":"uwo","oai_identifier":"oai:uwo.scholaris.ca:20.500.14721/29429"},"canonical_url":"https://search.dev.ndltd.org/etd/uwo/oai:uwo.scholaris.ca:20.500.14721/29429","repository":{"repo_id":"uwo","name":"Western University","base_url":"https://uwo.scholaris.ca/server/oai/request"},"display":{"title":"Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing","abstract":"The miniaturization of highly sensitive and accurate microsensors is crucial for advancing modern sensing technologies with the goal of integrating increasingly complex circuits onto compact devices, such as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom post-processing recipe was developed to fabricate the electrically controlled optomechanical device at the micron scale. A modified version of a Helmholtz coil was also designed and constructed to facilitate precise out-of-plane magnetic field measurements to characterize the sensor performance. The resulting magnetometer designed here is highly sensitive with a detection limit of 33nT.A/rtHz at 2.7MHz with a footprint area of only 115um x 161um making it highly effective for applications requiring out-of-plane magnetic field detection.","abstract_html":"The miniaturization of highly sensitive and accurate microsensors is crucial for advancing modern sensing technologies with the goal of integrating increasingly complex circuits onto compact devices, such as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom post-processing recipe was developed to fabricate the electrically controlled optomechanical device at the micron scale. A modified version of a Helmholtz coil was also designed and constructed to facilitate precise out-of-plane magnetic field measurements to characterize the sensor performance. The resulting magnetometer designed here is highly sensitive with a detection limit of 33nT.A/rtHz at 2.7MHz with a footprint area of only 115um x 161um making it highly effective for applications requiring out-of-plane magnetic field detection.","abstract_has_math":false,"creators":["Siquioco, Lance Ferdinand Sotto"],"institution":"The University of Western Ontario","degree_name":"M Eng Sci","degree_level":null,"degree_discipline":"Electrical and Computer Engineering","degree_department":null,"school":null,"contributors":[],"advisors":["Sabarinathan, Jayshri"],"committee_chairs":[],"committee_members":[],"year":2024,"date_issued":"2024-12-13","date_published":"2024-12-13","updated_at":"2026-07-27T21:56:20Z","subjects":["silicon photonics","photonic crystals","directional coupler","silicon-on-insulator","magnetic field sensors","magnetometer"],"languages":["en_ca"],"rights":[],"rights_urls":[],"identifier_entries":[]},"links":{"outbound_url":"https://hdl.handle.net/20.500.14721/29429","outbound_label":"Handle","outbound_source":"dc:identifier.uri"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:contributor.advisor","label":"Advisor","values":["Sabarinathan, Jayshri"]},{"key":"dc:creator","label":"Author","values":["Siquioco, Lance Ferdinand Sotto"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date.accessioned","label":"Dc Date Accessioned","values":["2025-07-10T18:31:51Z"]},{"key":"dc:date.issued","label":"Date","values":["2024-12-13"]},{"key":"dc:publisher","label":"Institution","values":["The University of Western Ontario"]},{"key":"dc:type","label":"Dc Type","values":["thesis"]},{"key":"thesis:degree_discipline","label":"Discipline","values":["Electrical and Computer Engineering"]},{"key":"thesis:degree_name","label":"Degree Name","values":["M Eng Sci"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["silicon photonics","photonic crystals","directional coupler","silicon-on-insulator","magnetic field sensors","magnetometer"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language.iso","label":"Language (ISO)","values":["en_ca"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier.uri","label":"Identifier URI","values":["https://hdl.handle.net/20.500.14721/29429"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."]},{"key":"dc:description.abstract","label":"Abstract","values":["The miniaturization of highly sensitive and accurate microsensors is crucial for advancing modern sensing technologies with the goal of integrating increasingly complex circuits onto compact devices, such as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom post-processing recipe was developed to fabricate the electrically controlled optomechanical device at the micron scale. A modified version of a Helmholtz coil was also designed and constructed to facilitate precise out-of-plane magnetic field measurements to characterize the sensor performance. The resulting magnetometer designed here is highly sensitive with a detection limit of 33nT.A/rtHz at 2.7MHz with a footprint area of only 115um x 161um making it highly effective for applications requiring out-of-plane magnetic field detection."]},{"key":"dc:title","label":"Title","values":["Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing"]}]}],"canonical_facts":{"dc:contributor.advisor":["Sabarinathan, Jayshri"],"dc:creator":["Siquioco, Lance Ferdinand Sotto"],"dc:date.accessioned":["2025-07-10T18:31:51Z"],"dc:date.issued":["2024-12-13"],"dc:description":["The thesis cover page in the PDF document includes references to Western University’s previous institutional repository platform, known as Scholarship@Western, and links to that platform (beginning with ir.lib.uwo.ca). In citing or referring to this thesis, use the DOI or handle from this page instead. Sample citation: Author name, \"Thesis title.\" (Year). Western University Open Repository. https://doi.org/10.71858/123456."],"dc:description.abstract":["The miniaturization of highly sensitive and accurate microsensors is crucial for advancing modern sensing technologies with the goal of integrating increasingly complex circuits onto compact devices, such as smart phones and wearables. In this work, a Lorentz force magnetometer was designed based on the concept of a photonic crystal directional coupler (PCDC) for magnetic field sensing perpendicular (out-of-plane) to the chip surface. Built on the Silicon-On-Insulator platform, a custom post-processing recipe was developed to fabricate the electrically controlled optomechanical device at the micron scale. A modified version of a Helmholtz coil was also designed and constructed to facilitate precise out-of-plane magnetic field measurements to characterize the sensor performance. The resulting magnetometer designed here is highly sensitive with a detection limit of 33nT.A/rtHz at 2.7MHz with a footprint area of only 115um x 161um making it highly effective for applications requiring out-of-plane magnetic field detection."],"dc:identifier.uri":["https://hdl.handle.net/20.500.14721/29429"],"dc:language.iso":["en_ca"],"dc:publisher":["The University of Western Ontario"],"dc:subject":["silicon photonics","photonic crystals","directional coupler","silicon-on-insulator","magnetic field sensors","magnetometer"],"dc:title":["Photonic Crystal Lorentz Force Magnetometer for Out-of-Plane Magnetic Field Sensing"],"dc:type":["thesis"],"thesis:degree_discipline":["Electrical and Computer Engineering"],"thesis:degree_name":["M Eng Sci"]},"updated_at":"2026-07-27T21:56:20Z"}