Photonic Microresonators Created by Slow Optical Cooking

Abstract

Silica and water are known as exceptionally inert chemical materials whose interaction is not completely understood. Here we show that the effect of this interaction can be significantly enhanced by optical whispering gallery modes (WGMs) propagating in a silica microcapillary filled with water. Our experiments demonstrate that WGMs, which evanescently heat liquid water over several hours, induce permanent alterations in silica material characterized by the subnanometer variation of the WGM spectrum. We use the discovered effect to fabricate optical WGM microresonators having potential applications in optical signal processing and microfluidic sensing. Our results pave the way for the ultraprecise fabrication of resonant optical microdevices and the ultra-accurate characterization of physical and chemical processes at solid-liquid interfaces.

Publication DOI: https://doi.org/10.1021/acsphotonics.0c01851
Divisions: College of Engineering & Physical Sciences > School of Informatics and Digital Engineering > Electrical and Electronic Engineering
College of Engineering & Physical Sciences
College of Engineering & Physical Sciences > Aston Institute of Photonics Technology (AIPT)
Additional Information: Creative Commons Attribution 4.0 International (CC BY 4.0) Funding: The authors acknowledge funding from Engineering and Physical Sciences Research Council (EPSRC) under Grant EP/P006183/1 and Wolfson Foundation under Grant 22069
Uncontrolled Keywords: optical microresonators,silica-water interface,surface nanoscale photonics,whispering gallery modes,Electronic, Optical and Magnetic Materials,Biotechnology,Atomic and Molecular Physics, and Optics,Electrical and Electronic Engineering
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
PURE Output Type: Article
Published Date: 2021-02-17
Published Online Date: 2021-01-14
Accepted Date: 2021-01-14
Authors: Gardosi, Gabriella
Mangan, Brian J.
Puc, Gabe S.
Sumetsky, Michael (ORCID Profile 0000-0001-7289-3547)

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