Ultrahigh Sensitivity Mach-Zehnder Interferometer Sensor Based on a Weak One-Dimensional Field Confinement Silica Waveguide

Ultrahigh Sensitivity Mach-Zehnder Interferometer Sensor Based on a Weak One-Dimensional Field Confinement Silica Waveguide

We report a novel Mach-Zehnder interferometer (MZI) sensor that utilizes a weak one-dimensional field confinement silica waveguide (WCSW). The WCSW has a large horizontal and vertical aspect ratio and low refractive index difference, which features easy preparation and a large evanescent field for a...

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Veröffentlicht in:Sensors (Basel, Switzerland) Switzerland), 2021-10, Vol.21 (19), p.6600, Article 6600
Hauptverfasser: Zhao, Chenming, Xu, Lei, Liu, Liying
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Chemistry, Analytical
Confinement
Electric fields
Engineering
Engineering, Electrical & Electronic
Instruments & Instrumentation
Interferometers
Mach−Zehnder interferometer sensor
Physical Sciences
Refractivity
Science & Technology
Sensitivity
Sensors
Technology
waveguide sensitivity
Waveguides
weak confinement waveguide
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Zusammenfassung:We report a novel Mach-Zehnder interferometer (MZI) sensor that utilizes a weak one-dimensional field confinement silica waveguide (WCSW). The WCSW has a large horizontal and vertical aspect ratio and low refractive index difference, which features easy preparation and a large evanescent field for achieving high waveguide sensitivity. We experimentally achieved WCSW ultrahigh waveguide sensitivity of 0.94, MZI sensitivity of 44,364 pi/RIU and a low limit of detection (LOD) of 6.1 x 10(-7) RIU.
ISSN:1424-8220
1424-8220
DOI:10.3390/s21196600