Tunable SNAP Microresonators via Internal Ohmic Heating

Vitullo, Dashiell L. P., Zaki, Sajid, Gardosi, Gabriella, Mangan, Brian J., Windeler, Robert S., Brodsky, Michael and Sumetsky, Misha (2018). Tunable SNAP Microresonators via Internal Ohmic Heating. Optics Letters, 43 (17), pp. 4316-4319.

Abstract

We demonstrate a thermally tunable Surface Nanoscale Axial Photonics (SNAP) platform. Stable tuning is achieved by heating a SNAP structure fabricated on the surface of a silica capillary with a metal wire positioned inside. Heating a SNAP microresonator with a uniform wire introduces uniform variation of its effective radius which results in constant shift of its resonance wavelengths. Heating with a nonuniform wire allows local nanoscale variation of the capillary effective radius, which enables differential tuning of the spectrum of SNAP structures as well as creation of temporary SNAP microresonators that exist only when current is applied. As an example, we fabricate two bottle microresonators coupled to each other and demonstrate differential tuning of their resonance wavelengths into and out of degeneracy with precision better than 0.2 pm. The developed approach is beneficial for ultraprecise fabrication of tunable ultralow loss parity-time symmetric, optomechanical, and cavity QED devices.

Publication DOI: https://doi.org/10.1364/OL.43.004316
Divisions: Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. Further distribution of this work must maintain attribution to the author(s) and the published article's title, journal citation, and DOI. Funding: Royal SocietyWolfson Research Merit Award (WM130110), Horizon 2020 Framework Programme (H2020) (H2020-EU.1.3.3, 691011), Engineering and Physical Sciences Research Council (EPSRC) (EP/P006183/1), and US Army Research Laboratory (ARL) (W911NF-17-2-0048).
Uncontrolled Keywords: Fiber optics components ,Microcavities,Micro-optical devices
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Related URLs: https://www.osa ... i=ol-43-17-4316 (Publisher URL)
Accepted Date: 2018-07-03
Published Date: 2018-08-31
Authors: Vitullo, Dashiell L. P.
Zaki, Sajid
Gardosi, Gabriella
Mangan, Brian J.
Windeler, Robert S.
Brodsky, Michael
Sumetsky, Misha ( 0000-0001-7289-3547)

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