All-optical nanopositioning of high-Q silica microspheres

All-optical nanopositioning of high-Q silica microspheres

A tunable, all-optical, coupling method is realised for a high-Q silica microsphere and an optical waveguide. By means of a novel optical nanopositioning method, induced thermal expansion of an asymmetric microsphere stem for laser powers up to 211 mW is observed and used to fine tune the microspher...

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Veröffentlicht in:Optics express 2017-06, Vol.25 (12), p.13101-13106
Hauptverfasser: Murphy, Rafino M J, Lei, Fuchuan, Ward, Jonathan M, Yang, Yong, Chormaic, Síle Nic
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container_end_page 13106
container_issue 12
container_start_page 13101
container_title Optics express
container_volume 25
creator Murphy, Rafino M J
Lei, Fuchuan
Ward, Jonathan M
Yang, Yong
Chormaic, Síle Nic
description A tunable, all-optical, coupling method is realised for a high-Q silica microsphere and an optical waveguide. By means of a novel optical nanopositioning method, induced thermal expansion of an asymmetric microsphere stem for laser powers up to 211 mW is observed and used to fine tune the microsphere-waveguide coupling. Microcavity displacements ranging from (0.61 ± 0.13) - (3.49 ± 0.13) μm and nanometer scale sensitivities varying from (2.81 ± 0.08) - (17.08 ± 0.76) nm/mW, with an apparent linear dependency of coupling distance on stem laser heating, are obtained. Using this method, the coupling is altered such that the different coupling regimes are achieved.
doi_str_mv 10.1364/OE.25.013101
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title All-optical nanopositioning of high-Q silica microspheres
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