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Ultra-smooth microcylindrical resonators fabricated from the silicon optical fiber platform

Natasha Vukovic1, Noel Healy1, Peter Horak1, Justin R.Sparks2, Pier J.A.Sazio1, John V.Badding2, and Anna C.Peacock1

1. Optoelectronics Research Centre, University of Southampton, UK
2. Department of Chemistry and Materials Research Institute, Pennsylvania State University, Pennsylvania 16802, USA


We demonstrate a type of microcavity with minimal-volume confinement using a high-contrast phase-shifted Bragg grating in a microfiber. While waveguiding by the air-silica boundary provides a diffraction-limited two-dimensional confinement, the grating introduces the third degree of confinement. Theoretical simulations verified the microfiber cavity confinement while the experimental demonstration, carried out in samples nanostructured by focused ion beam, showed a good agreement with theoretical predictions. This cavity can be used for a variety of applications ranging from sensing to quantum dynamic experiments.

Applied Physics Letters (2011) Vol.99(3) pp.31117

doi: 10.1063/1.3615689

Southampton ePrint id: 201143


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