Observation of thermal feedback on the optical coupling noise of a microsphere attached to a low-spring-constant cantilever

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dc.contributor.authorWu, Yuqiang
dc.contributor.authorWard, Jonathan
dc.contributor.authorNic Chormaic, Síle
dc.contributor.funderScience Foundation Ireland
dc.contributor.funderIrish Research Council for Science, Engineering and Technology
dc.contributor.funderFP7 People: Marie-Curie Actions
dc.date.accessioned2017-08-22T10:30:37Z
dc.date.available2017-08-22T10:30:37Z
dc.date.issued2012
dc.description.abstractA silica microsphere on a low-spring-constant cantilever (pendulum) is fabricated and evanescently coupled to a tapered optical fiber. The motion of the pendulum is detected as variations in the transmitted laser power through the tapered fiber. The optical coupling noise created by the pendulum motion is recorded by taking a fast Fourier transform of the transmitted laser power and the fundamental mechanical mode of the pendulum at 1.16 kHz is observed. The thermal damping and amplification of the coupling noise is investigated and the effect of the thermal feedback on the noise spectrum is examined. The response of the thermo-optical feedback to small transient and driven variations in the taper-pendulum separation for different values of laser detuning is demonstrated. Preliminary results on the optical force between the pendulum and the tapered fiber are also presented. Microspherical pendulums, with low mechanical spring constant, could be used for studying nanoscopic optical and mechanical forces, or optical cooling.en
dc.description.sponsorshipScience Foundation Ireland (08/ERA/I1761); Irish Research Council for Science, Engineering and Technology (Embark Initiative)en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid53820
dc.identifier.citationWu, Y., Ward, J. and Nic Chormaic, S. (2012) 'Observation of thermal feedback on the optical coupling noise of a microsphere attached to a low-spring-constant cantilever', Physical Review A, 85(5), 053820. (8pp). doi: 10.1103/PhysRevA.85.053820en
dc.identifier.doi10.1103/PhysRevA.85.053820
dc.identifier.issn2469-9926
dc.identifier.issn2469-9934
dc.identifier.issued5
dc.identifier.journaltitlePhysical Review Aen
dc.identifier.urihttps://hdl.handle.net/10468/4501
dc.identifier.volume85
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.projectinfo:eu-repo/grantAgreement/EC/FP7::SP3::PEOPLE/229520/EU/IRCSET International Mobility Fellowships in Science Engineering and Technology: co-funded by Marie Curie Actions/INSPIRE
dc.relation.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.85.053820
dc.rights© 2012, American Physical Societyen
dc.subjectWhispering-gallery modesen
dc.subjectMicromechanical oscillatoren
dc.subjectMicrobubble resonatoren
dc.subjectCavityen
dc.subjectMicroresonatorsen
dc.subjectMicrocavitiesen
dc.subjectForcesen
dc.titleObservation of thermal feedback on the optical coupling noise of a microsphere attached to a low-spring-constant cantileveren
dc.typeArticle (peer-reviewed)en
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