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dc.contributor.authorNelson, A.
dc.contributor.authorGuzman, F.
dc.date.accessioned2021-10-16T02:18:40Z
dc.date.available2021-10-16T02:18:40Z
dc.date.issued2021
dc.identifier.citationNelson, A., & Guzman, F. (2021). Micro-fabrication of Si-based optomechanical inertial sensors for cryogenic temperatures. Proceedings of SPIE - The International Society for Optical Engineering, 11817.
dc.identifier.isbn9781510644724
dc.identifier.issn0277-786X
dc.identifier.doi10.1117/12.2594388
dc.identifier.urihttp://hdl.handle.net/10150/662106
dc.description.abstractThe design of next generation gravitational wave observatories considers operation at cryogenic temperatures to enhance their sensitivity by reducing thermal noise fluctuations. Inertial sensors are used on the observatory platforms to measure local seismic noise and counteract its effects by active control or subtraction in post-processing. Measuring the displacement of a test mass in a resonator system allows for creation of a compact accelerometer system. Currently, there are no commercial inertial sensors available that are capable of operating at cryogenic temperatures and providing the required sensitivities for gravitational wave observatories. Materials such as fused silica exhibit very low losses at room temperature. However, this changes significantly at lower temperatures. Unlike fused silica, the Q factor of crystalline silicon structures is expected to remain high at low temperatures, making it a likely candidate for use in these types of inertial sensors. We are working to fabricate compact mechanical resonators from Si wafers to test their mechanical response. Micro-fabrication consists of optimizing the photolithography and Bosch etching processes for through-wafer Si etching on a 280 μm, 500 μm, and 1 mm wafer. Successful etching on 280 μm wafers has been achieved. We report on the design, model, and fabrication progress of these resonators. © 2021 SPIE.
dc.language.isoen
dc.publisherSPIE
dc.rightsCopyright © 2021 SPIE.
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subjectaccelerometer
dc.subjectBosch
dc.subjectInertial sensor
dc.subjectmicro-fabrication
dc.titleMicro-fabrication of Si-based optomechanical inertial sensors for cryogenic temperatures
dc.typeProceedings
dc.typetext
dc.contributor.departmentWyant College of Optical Sciences, University of Arizona
dc.identifier.journalProceedings of SPIE - The International Society for Optical Engineering
dc.description.noteImmediate access
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.
dc.eprint.versionFinal published version
dc.source.journaltitleProceedings of SPIE - The International Society for Optical Engineering
refterms.dateFOA2021-10-16T02:18:40Z


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