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Integration of fiber coupled high-Q silicon nitride microdisks with atom chips

Paul E. Barclay, Benjamin Lev, Kartik Srinivasan, Oskar Painter, Hideo Mabuchi

quant-pharXiv:quant-ph/0605234

Abstract

Micron scale silicon nitride (SiNx) microdisk optical resonators are demonstrated with Q = 3.6 x 106 and an effective mode volume of 15 (λ/ n)3 at near visible wavelengths. A hydrofluoric acid wet etch provides sensitive tuning of the microdisk resonances, and robust mounting of a fiber taper provides efficient fiber optic coupling to the microdisks while allowing unfettered optical access for laser cooling and trapping of atoms. Measurements indicate that cesium adsorption on the SiNx surfaces significantly red-detunes the microdisk resonances. A technique for parallel integration of multiple (10) microdisks with a single fiber taper is also demonstrated.

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