Formation and precise geometry control of SNAP microresonators by external electrostatic fields

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Abstract

In SNAP (Surface nanoscale axial photonics) resonators propagation of a slow whispering gallery mode along an optical fiber is controlled by nanoscale variation of the effective radius of the fiber [1]. Similar behavior can be realized in so - called nanobump microresonators in which the introduced variation of the effective radius is asymmetric, i.e. depends on the axial coordinate [2]. The possibilities of realization of such structures “on the fly” in an optical fiber by applying external electrostatic fields to it is discussed in this work. It is shown that local variations in effective radius of the fiber and in its refractive index caused by external electric fields can be large enough to observe SNAP structure
- like behavior in an originally flat optical fiber.
Theoretical estimations of the introduced refractive index and effective radius changes and results of finite element calculations are presented. Various effects are taken into account: electromechanical (piezoelectricity and electrostriction), electro-optical (Pockels and Kerr effects) and elasto-optical effect. Different initial fibre cross-sections are studied. The aspects of use of linear isotropic (such as silica) and non-linear anisotropic (such as lithium niobate) materials of the fiber are discussed.
REFERENCES
[1] M. Sumetsky, J. M. Fini, Opt. Exp. 19, 26470 (2011).
[2] L. A. Kochkurov, M. Sumetsky, Opt. Lett. 40, 1430 (2015).

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Original languageEnglish
Pages121
Number of pages1
Publication statusPublished - 31 Aug 2015
Event5th international school and conferenceon photonics - Belgrade, Serbia
Duration: 24 Aug 201528 Aug 2015

Conference

Conference5th international school and conferenceon photonics
Abbreviated titlePHOTONICA 2015
CountrySerbia
CityBelgrade
Period24/08/1528/08/15

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