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Effect of a dielectric substrate on whispering-gallery-mode sensors

Le Thomas, Nicolas, Woggon, Ulrike, Langbein, Wolfgang Werner and Artemyev, Mikhail V. 2006. Effect of a dielectric substrate on whispering-gallery-mode sensors. Journal of the Optical Society of America B 23 (11) , pp. 2361-2365. 10.1364/JOSAB.23.002361

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Abstract

The effect of a dielectric substrate on whispering-gallery-mode (WGM)-based devices is experimentally investigated and theoretically quantified for spherical dielectric microresonators with ∼5 μm diameter. The interaction with a dielectric substrate yields a homogeneous broadening with a threshold-like behavior versus the azimuthal quantum number, which is accompanied by an energy renormalization of about 20% of the broadening. The WGM orbital planes of narrowest spectral linewidth (close to the Mie value) in the presence of a substrate are identified, and the consequences for the scattering spectrum analysis of microsphere devices relying on high-Q factors are discussed.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Physics and Astronomy
Subjects: Q Science > QC Physics
Publisher: Optical Society of America
ISSN: 0740-3224
Last Modified: 04 Jun 2017 08:00
URI: http://orca.cf.ac.uk/id/eprint/71366

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