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Measuring Optomechanics with a Photon STM in the High Vacuum Environment Open Access


Other title
Optical Fiber Pulling
Type of item
Degree grantor
University of Alberta
Author or creator
Reid, Kyle L
Supervisor and department
Freeman, Mark (Physics)
Davis, John (Physics)
Examining committee member and department
Meldrum, Alkiviathes (Physics)
Davis, John (Physics)
Maciejko, Joseph (Physics)
Freeman, Mark (Physics)
Hegmann, Frank (Physics)
Department of Physics

Date accepted
Graduation date
Master of Science
Degree level
Optomechanics, the sensing of mechanical movement using optical modes, has seen great advancement in recent years and has been used for its high displacement sensitivity to couple to a variety of mechanical devices. Torsional devices have historically been used for measuring de Haas-van Alphen effect, shear modulus, superfluids, superconductors, the angular momentum of light, switching of magnetic states, and other applications. Combining these two together, a silicon microdisk coupled to a torsional resonator has been observed before to have sensitivities of 4 nrad Hz−1/2 and 7 fm Hz−1/2. A cryogenic ultra-high vacuum (UHV) system holds the possibilities of analyzing these devices at 4 K in a much higher vacuum than has been studied before. We have retrofitted a former STM with a tapered optical fiber to couple light to a silicon microdisk. This “Photon STM” (P-STM) has the potential to not only couple to optical devices, but map the optical topography of a sample by using a modified tunnel current technique. This thesis shows how the P-STM was constructed and demonstrated its ability to couple to a 38 μm diameter optical disk and measured a nearby torsional resonator in high vacuum, with sensitivities down to 200 fm Hz−1/2 and 80 nrad Hz−1/2.
Permission is hereby granted to the University of Alberta Libraries to reproduce single copies of this thesis and to lend or sell such copies for private, scholarly or scientific research purposes only. Where the thesis is converted to, or otherwise made available in digital form, the University of Alberta will advise potential users of the thesis of these terms. The author reserves all other publication and other rights in association with the copyright in the thesis and, except as herein before provided, neither the thesis nor any substantial portion thereof may be printed or otherwise reproduced in any material form whatsoever without the author's prior written permission.
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