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Thermal nonlinearity in silicon microcylindrical resontors

Natasha Vukovic1, Noel Healy1, Priyanth Mehta1, Todd D.Day2, 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, 16802 PA, USA


We explore the thermally induced nonlinearity in hydrogenated amorphous silicon microcylindrical resonators that are fabricated from the silicon optical fiber platform. In particular, we use a pump-probe technique to experimentally demonstrate thermally induced optical modulation and determine the response time. Through characterization of the thermal properties and the associated resonance wavelength shifts we will show that it is possible to infer the material absorption coefficient for a range of whispering gallery mode resonators.

Applied Physics Letters (2012) Vol.100(18) pp.181101

doi: 10.1063/1.4709424

Southampton ePrint id: 339962


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