Issue 15, 2019, Issue in Progress
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RSC Advances

Mid-infrared GaAs/AlGaAs micro-ring resonators characterized via thermal tuning

Julian Haas, ORCID logo a   Philipp Artmanna  and  Boris Mizaikoff ORCID logo *a  

* Corresponding authors

a Institute of Analytical and Bioanalytical Chemistry, Ulm University, Albert-Einstein-Allee 11, D-89081 Ulm, Germany
E-mail: boris.mizaikoff@uni-ulm.de

Abstract

Micro-ring resonators with a decoupling waveguide have been manufactured from GaAs/Al0.2Ga0.8As, accommodating mid-infrared wavelengths, and were characterized via thermal tuning. A Q-factor of 1900, a thermal full width at half maximum of 8 °C, and a thermal free spectral range of 18 °C have been achieved. The low Q-factor indicates comparatively high coupling efficiency from the input waveguide into the decoupling waveguide. The micro-ring resonators shown herein are suitable structures for advanced mid-infrared chem/bio sensing strategies via resonant-cavity enhancement. In addition, they offer high spectral resolution for evanescent field sensing strategies via effective wavelength de-multiplexing waveguide structures.

Graphical abstract: Mid-infrared GaAs/AlGaAs micro-ring resonators characterized via thermal tuning

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Article information

DOI
https://doi.org/10.1039/C8RA10395J
Article type
Paper
Submitted
19 Dec 2018
Accepted
05 Mar 2019
First published
14 Mar 2019
This article is Open Access
Creative Commons BY-NC license

RSC Adv., 2019,9, 8594-8599

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Mid-infrared GaAs/AlGaAs micro-ring resonators characterized via thermal tuning

J. Haas, P. Artmann and B. Mizaikoff, RSC Adv., 2019, 9, 8594 DOI: 10.1039/C8RA10395J

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