High-Q superconducting coplanar waveguide resonators for integration into molecule ion traps
Name
699758797-MIT.pdf
Description
Full printable version
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6.87 MB
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Checksum (MD5)
5e62f6c46a64e8ddb844b1ad6f4e914f
Author(s)
McCaughan, Adam Nykoruk
Alternative Title
Fabrication and characterization of superconducting coplanar waveguide microresonators
Date Issued
2010
Publisher
Massachusetts Institute of Technology
Abstract
Over the last decade, quantum information experiments with trapped ions have demonstrated essential steps towards quantum computing and quantum simulation. Large fields are required to achieve strong coupling to the ions via dipolar interactions, and so we fabricated transmission line microresonators-capable of producing large fields in a standing wave at resonance-for eventual integration into 2D ion trap structures. The resonators were superconducting to minimize loss and maximize quality factor. We fabricated the resonators as two dimensional coplanar waveguides in niobium on R-plane sapphire using optical lithography. Resist was patterned on the niobium using optical lithography, developed, then reactive-ion etched to transfer the pattern into the niobium. The resonators were cooled and tested in a cryogenic probe station and characterized with a network analyzer. Additionally, the resonator geometry was reproduced in commercial microwave simulation software. Results from our fabricated resonators showed first-resonance quality factors of 1.2x 104 at 3.23 GHz at device temperatures of 3-4 K.
Description
Thesis (M. Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 2010.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 94-96).
Subjects
Electrical Engineering and Computer Science.
MIT Department
Massachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
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