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Resonators Sensors
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Resonators Sensors

A special issue of Sensors (ISSN 1424-8220). This special issue belongs to the section "Physical Sensors".

Deadline for manuscript submissions: closed (20 November 2021) | Viewed by 10693

Special Issue Editor

Dr. Silvia Soria Huguet

E-Mail Website
Guest Editor
IFAC-CNR, Institute of Applied Physics, Via Madonna del Piano10, 50019 Sesto Fiorentino (FI), Italy
Interests: optical resonators; optical sensors; nonlinear optical techniques
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The field of sensors has witnessed an enormous interest in the last few decades and has reached a good level of maturity due to the constant advances in fabrication techniques and in their applications. Resonating structures can be one-, two- and three-dimensional; partially or fully integrated; and last but not least, they can be made of a huge variety of materials: Metallic, dielectric, polymeric or hybrid. The transducing schemes range from plasmonic to optical, and they comprise different cavities and resonators, ranging from, but not limited to: Whispering gallery mode resonators, photonic crystals, and grating waveguide resonators. Common examples of applications include physical (temperature, pressure, displacement and field) sensors and chemical (biological, medical, agriculture and environment) sensors.

We invite manuscripts for this forthcoming Special Issue in all aspects pertinent to resonator sensors. Both reviews and original research articles are welcome. Reviews should provide an up-to-date and critical overview of state-of-the-art technologies, such as whispering gallery modes, photonic crystals, grating waveguide resonators or any other resonator-based sensing mechanism. Original research papers that describe the utilization of resonating platforms in sensing, or new concepts and fundamental studies with potential relevance to sensing are also of interest. If you have suggestions that you would like to discuss beforehand, please feel free to contact me. I look forward to and welcome your participation in this Special Issue.

Dr. Silvia Soria Huguet
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Sensors is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • microcavities;
  • resonators;
  • whispering gallery mode;
  • grating waveguide resonators;
  • morphology dependent resonances;
  • microknots

Sensing applications:

  • Physical Sensors (temperature, pressure, mass, particulate matter)
  • Biochemical Sensors (diagnostics, food safety, environmental)
  • Safety and Security (IED detection, biological agents, drug, and pollutants)

Published Papers (4 papers)

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14 pages, 4447 KiB  
Article
Whispering Gallery Mode Resonators for Precision Temperature Metrology Applications
by Giovanni Gugliandolo, Shahin Tabandeh, Lucia Rosso, Denis Smorgon and Vito Fernicola
Sensors 2021, 21(8), 2844; https://doi.org/10.3390/s21082844 - 17 Apr 2021
Cited by 16 | Viewed by 3113
Abstract
In this work, the authors exploited the whispering gallery mode (WGM) resonator properties as a thermometer. The sensor is made of a cylindrical sapphire microwave resonator in the center of a gold-plated copper cavity. Two coaxial cables act as antennas and excite the [...] Read more.
In this work, the authors exploited the whispering gallery mode (WGM) resonator properties as a thermometer. The sensor is made of a cylindrical sapphire microwave resonator in the center of a gold-plated copper cavity. Two coaxial cables act as antennas and excite the WGM standing waves in the cylindrical sapphire at selected resonance frequencies in the microwave range. The system affords a high quality factor that enables temperature measurements with a resolution better than 15 µK and a measurement standard uncertainty of 1.2 mK, a value approximately three times better than that achieved in previous works. The developed sensor could be a promising alternative to platinum resistance thermometers, both as a transfer standard in industrial applications and as an interpolating instrument for the dissemination of the kelvin. Full article
(This article belongs to the Special Issue Resonators Sensors)
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9 pages, 1318 KiB  
Communication
Application of WGM Resonances to the Measurement of the Temperature Increment of Ho and Ho-Yb Doped Optical Fibers Pumped at 1125 and 975 nm
by Xavier Roselló-Mechó, Martina Delgado-Pinar, Yuri O. Barmenkov, Alexander V. Kir’yanov and Miguel V. Andrés
Sensors 2021, 21(6), 2094; https://doi.org/10.3390/s21062094 - 17 Mar 2021
Cited by 3 | Viewed by 1731
Abstract
Optical fiber characterization using whispering gallery mode resonances of the fiber itself has been demonstrated to be a powerful technique. In this work, we exploit the thermal sensitivity of whispering gallery mode resonances to characterize the pump-induced temperature increment in holmium doped and [...] Read more.
Optical fiber characterization using whispering gallery mode resonances of the fiber itself has been demonstrated to be a powerful technique. In this work, we exploit the thermal sensitivity of whispering gallery mode resonances to characterize the pump-induced temperature increment in holmium doped and holmium-ytterbium codoped optical fibers. The technique relies on the measurement of the resonances’ wavelength shift due to temperature variation as a function of the pump power. Holmium doped fibers were pumped to the second excited level 5I6 of the Ho3+ ion using a laser diode at 1125 nm and ytterbium-holmium codoped fibers to the 2F5/2 level of the Yb3+ ion by a laser diode at 975 nm. Our results demonstrate that pumping ytterbium-holmium codoped fibers at 975 nm results in dramatic thermal effects, producing a temperature increment two orders higher than that observed in holmium doped fibers pumped with a 1125 nm laser diode. Full article
(This article belongs to the Special Issue Resonators Sensors)
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10 pages, 639 KiB  
Article
Microbubble Resonators for All-Optical Photoacoustics of Flowing Contrast Agents
by Gabriele Frigenti, Lucia Cavigli, Alberto Fernández-Bienes, Fulvio Ratto, Sonia Centi, Tupak García-Fernández, Gualtiero Nunzi Conti and Silvia Soria
Sensors 2020, 20(6), 1696; https://doi.org/10.3390/s20061696 - 18 Mar 2020
Cited by 11 | Viewed by 3094
Abstract
In this paper, we implement a Whispering Gallery mode microbubble resonator (MBR) as an optical transducer to detect the photoacoustic (PA) signal generated by plasmonic nanoparticles. We simulate a flow cytometry experiment by letting the nanoparticles run through the MBR during measurements and [...] Read more.
In this paper, we implement a Whispering Gallery mode microbubble resonator (MBR) as an optical transducer to detect the photoacoustic (PA) signal generated by plasmonic nanoparticles. We simulate a flow cytometry experiment by letting the nanoparticles run through the MBR during measurements and we estimate PA intensity by a Fourier analysis of the read-out signal. This method exploits the peaks associated with the MBR mechanical eigenmodes, allowing the PA response of the nanoparticles to be decoupled from the noise associated with the particle flow whilst also increasing the signal-to-noise ratio. The photostability curve of a known contrast agent is correctly reconstructed, validating the proposed analysis and proving quantitative PA detection. The experiment was run to demonstrate the feasible implementation of the MBR system in a flow cytometry application (e.g., the detection of venous thrombi or circulating tumor cells), particularly regarding wearable appliances. Indeed, these devices could also benefit from other MBR features, such as the extreme compactness, the direct implementation in a microfluidic circuit, and the absence of impedance-matching material. Full article
(This article belongs to the Special Issue Resonators Sensors)
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Other

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13 pages, 3064 KiB  
Letter
Synchronization Theory-Based Analysis of Coupled Vibrations of Dual-Tube Coriolis Mass Flowmeters
by Zhong-Xiang Li, Chun Hu, De-Zhi Zheng and Shang-Chun Fan
Sensors 2020, 20(21), 6340; https://doi.org/10.3390/s20216340 - 06 Nov 2020
Cited by 3 | Viewed by 2012
Abstract
Certain nonlinear influences are found in dual-tube Coriolis mass flowmeters (CMFs). According to experimentation, a nonlinearity dominated by frequency-doubling signals can be observed in the measuring signal. In general, such nonlinear effects are simplified as linear systems or neglected through processing. In this [...] Read more.
Certain nonlinear influences are found in dual-tube Coriolis mass flowmeters (CMFs). According to experimentation, a nonlinearity dominated by frequency-doubling signals can be observed in the measuring signal. In general, such nonlinear effects are simplified as linear systems or neglected through processing. In this paper, a simplified model has been constructed for dual-beam CMFs based on the theory of nonlinear dynamics, with the spring–damper system as the medium for the dual-beam coupled vibrations. Next, the dynamics differential equation of the coupled vibrations is set up on the basis of the Lagrangian equation. Furthermore, numerical solutions are obtained using the Runge–Kutta fourth-order method. The study then fits discrete points of the numerical solutions, which are converted into the frequency domain to observe the existence of frequency-doubling signal components. Our findings show that frequency-doubling components exist in the spectrogram, proving that these nonlinear influences are a result of the motions of coupled vibrations. In this study, non-linear frequency-doubling signal sources are qualitatively analyzed to formulate a theoretical basis for CMFs design. Full article
(This article belongs to the Special Issue Resonators Sensors)
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