Confocal scanner for highly sensitive photonic transduction of nanomechanical resonators

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DOIResolve DOI: http://doi.org/10.7567/APEX.6.065202
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TypeArticle
Journal titleApplied Physics Express
ISSN1882-0778
Volume6
Issue6
Article number65202
SubjectConfocal laser scanning; Coupling efficiency; Doubly clamped beam; Free-space optical; Nanomechanical resonators; Nanophotonic circuits; Orders of magnitude; Resonant response; Bacteriophages; Nanophotonics; Resonators; Coupled circuits
AbstractWe show that a simple confocal laser scanning system can be used to couple light through grating couplers into nanophotonic circuits. The coupling efficiency is better than 15% per coupler. Our technique avoids using multi-axis fibre stages and is especially advantageous when the nanophotonic circuit is kept in vacuum, e.g., for nanomechanical resonator displacement transduction. This was demonstrated by recording the resonant response of a nanomechanical doubly clamped beam embedded in a race-track optical cavity. The nanophotonic transduction offers an increase of two orders of magnitude in transduction responsivity compared with conventional free-space optical interferometry.
Publication date
LanguageEnglish
AffiliationNational Research Council Canada (NRC-CNRC); Security and Disruptive Technologies
Peer reviewedYes
NPARC number21270527
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Record identifier5f7dd8aa-8ce0-4029-8d72-fab36ffc563d
Record created2014-02-17
Record modified2016-05-09
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