Research on the gas refractive index sensing based on microfiber double-knot resonator with a parallel structure

Sun, Shikun; Xu, Yan; Ren, Liyong; Xu, Jian; Jia, Tianxu; Zhang, Lei; Xiao, Jianting; Wang, Bingchuan; Yang, Wen-Xing; Cheng, Shubo; Chen, Fang; Ma, Chengju; Song, Feng

doi:10.1016/j.ijleo.2020.164207

Cited by 6 publications

(7 citation statements)

References 28 publications

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“…Thus, a low detection limit of ∼5.85 × 10 –5 RIU (1.49% in CO 2 concentration) is achieved in the current PF-MC sensor. The detailed comparison of the sensitivity with other optical RI-based gas sensors is summarized in Figure c. ,,− A more comprehensive comparison of the CO 2 sensing performance of the typical reported sensors and the present work is summarized in Table . We should stress that the sensitivity of the PF-MC can compare favorably with plenty of other optical gas sensors in previous reports.…”

Section: Resultsmentioning

confidence: 97%

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing

Kong

Zhao

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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Carbon dioxide (CO2) sensing using an optical technique is of great importance in the environment and industrial emission monitoring. However, limited by the poor specific adsorption of gas molecules as well as insufficient coupling efficiency, there is still a long way to go toward realizing a highly sensitive optical CO2 gas sensor. Herein, by combining the advantages of a whispering-gallery-mode microcavity and a metal–organic framework (MOF) film, a porous functional microcavity (PF-MC) was fabricated with the assistance of the atomic layer deposition technique and was applied to CO2 sensing. In this functional composite, the rolled-up microcavity provides the ability to tune the propagation of light waves and the electromagnetic coupling with the surroundings via an evanescent field, while the nanoporous MOF film contributes to the specific adsorption of CO2. The composite demonstrates a high sensitivity of 188 nm RIU–1 (7.4 pm/% with respect to the CO2 concentration) and a low detection limit of ∼5.85 × 10–5 RIU. Furthermore, the PF-MC exhibits great selectivity to CO2 and outstanding reproducibility, which is promising for the next-generation optical gas sensing devices.

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Section: Resultsmentioning

confidence: 97%

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing

Kong

Zhao

Wang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Recently, two improved structures have remained light-permeable: one that alters the circle [46] and the other that parallels a small ring to a large ring. [80,81] Images 10 and 11 in Figure 1c separately show an example of typical configurations of these two different structures.…”

Section: Transmissive Structurementioning

confidence: 99%

“…The EIT window disappears when the knot region of the small ring is fully coupled and the structure is equivalent to a single-ring MKR, which is commonly used for slow optical delay based on this property. For sensing purposes, the structure has a longer circumference, greater contact [81] Copyright 2020, Elsevier. [47] Copyright 2012, MDPI.…”

Section: Transmissive Structurementioning

confidence: 99%

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Zhang,

Gao,

Xia

et al. 2023

Laser & Photonics Reviews

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In recent years, compact micro‐/nanofiber sensors with fast response and high resolution have become a hot field in sensing and nanotechnology. In addition to the unique properties of microfibers such as strong evanescent field, low optical loss, and easy integration, microfiber knot resonators further improve the sensing capability due to their resonance properties. The potential high‐quality factor allows higher sensing sensitivity and resolution, which is very attractive for optical sensing at the micro‐/nano scale. More application potential can be effectively stimulated by improving the structure shape or principle or combining with functional sensitive materials. This paper first introduces the preparation process and spectral characteristics of conventional microfiber knots and then focuses on three new types of devices for enhancing the sensing performance, namely material‐coated, shape‐improved, and principle‐extended, and briefly analyzes their spectral properties. In addition, the research progress and applications of these sensors are summarized. Finally, the existing problems in this field are analyzed, and the directions for further development are discussed and prospected.

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“…n [1 000,1 001] a , this value is FOM * = 12200. This value would mean a capability of measuring change in the index of refraction as low as × − 8 10 5 RIU, that may account for variations in the index of refraction of air 5,14,[34][35][36]39,45 .…”

Section: Design Typementioning

confidence: 99%

“…To do that, several optical technologies have been applied to sense refractometric changes in gases. For example, we can find interferometric systems 14,[37][38][39][40] plasmonic devices 31,[41][42][43] , or sensor based on specialized fibers and photonic crystals 23,26,32,44,45 . Our system, based on the selective resonances generated by subwavelength metallic gratings on a modified perovskite cell can provide an alternative.…”

mentioning

confidence: 99%

Enabling selective absorption in perovskite solar cells for refractometric sensing of gases

Elshorbagy

Cuadrado

Romero

et al. 2020

Sci Rep

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Summarizing the finding of this paper, we are proposing a refractometric sensor that modifies a perovskite solar cell. This modification takes the form of a subwavelength metallic grating acting as the front contact of the cell. All the system (light source, sensor, and acquisition electronics) can be packed together within a tiny volume allowing miniaturization. The detection uses the electric signal delivered by the cell. This approach does not require any goniometer or spectrometer, making the device easier to operate. When considering a modified figure of merit, ⁎ FOM , to describe the behavior of the device, the reported values are very competitive with existing technologies.

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Research on the gas refractive index sensing based on microfiber double-knot resonator with a parallel structure

Cited by 6 publications

References 28 publications

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Enabling selective absorption in perovskite solar cells for refractometric sensing of gases

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Research on the gas refractive index sensing based on microfiber double-knot resonator with a parallel structure

Cited by 6 publications

References 28 publications

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO2 Sensing

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO2 Sensing

Microfiber Knot Resonators: Structure, Spectral Properties, and Sensing Applications

Enabling selective absorption in perovskite solar cells for refractometric sensing of gases

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Product

Resources

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Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing

Integration of a Metal–Organic Framework Film with a Tubular Whispering-Gallery-Mode Microcavity for Effective CO₂ Sensing