Crystalline MgF2 whispering gallery mode resonators for enhanced bulk index sensitivity View Full Text


Ontology type: schema:ScholarlyArticle     


Article Info

DATE

2014-09

AUTHORS

R. Zeltner, F. Sedlmeir, G. Leuchs, H. G. L. Schwefel

ABSTRACT

We report on experiments on refractrometric sensing with crystalline Whispering Gallery Mode (WGM) resonators made of magnesium fluoride, which has a refractive index that is only slightly larger than that of water (Δn ≈ 0.05). The resulting evanescent field of a WGM resonator placed in an aqueous environment penetrates therefore deep into the surrounding medium, which makes it a promising candidate for sensing applications. We measured a bulk index sensitivity of 1.09 nm/RIU (refractive index unit) in a resonator with a radius of R = 2.91 mm and intrinsic Q-factors of more than 108 in aqueous environments. Furthermore, we describe the fabrication process of crystalline WGM resonators. More... »

PAGES

1989-1994

References to SciGraph publications

Identifiers

URI

http://scigraph.springernature.com/pub.10.1140/epjst/e2014-02241-8

DOI

http://dx.doi.org/10.1140/epjst/e2014-02241-8

DIMENSIONS

https://app.dimensions.ai/details/publication/pub.1038580549


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