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Waveguide-Based Sensors and Applications

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

Deadline for manuscript submissions: 25 May 2025 | Viewed by 2828

Special Issue Editors


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Guest Editor
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
Interests: electronic engineering; optoelectronics; photonics; sensors; solar cells; optical quantum systems; neural networks; machine learning
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Information Engineering, Electronics and Telecommunications, Sapienza University of Rome, Via Eudossiana 18, 00184 Rome, Italy
Interests: lab-on-chip; robotics; optical biosensor; MEMS; NEMS; microgripper; microelectronics technology

Special Issue Information

Dear Colleagues,

Waveguide-based sensors represent a cutting-edge photonic technology revolutionizing the field of sensing through their ability to guide light with high precision. These sensors offer remarkable advantages in sensitivity, selectivity, and integration with electronic systems, making them ideal for a broad range of applications, from environmental monitoring to biomedical diagnostics. Recent advancements in optoelectronic materials and fabrication techniques have further expanded the capabilities of waveguide sensors, leading to innovative designs and improved performance.

The objective of this Special Issue is to foster discussions on the latest advancements in waveguide-based sensing technologies and their diverse applications. We aim to highlight innovative research and practical implementations that demonstrate the versatility and effectiveness of these sensors. Topics of interest include, but are not limited to, the following: 

  • Optical waveguides for sensing;
  • Integrated photonic sensor systems;
  • Plasmonic waveguides and sensors;
  • Fiber optic sensors and applications;
  • Environmental sensing technologies;
  • Biomedical waveguide sensors;
  • Lab-on-a-chip systems;
  • Refractive index sensors;
  • Optoelectronic materials for sensors systems;
  • Signal processing techniques for waveguide sensors. 

Prof. Dr. Rita Asquini
Dr. Alessio Buzzin
Guest Editors

Manuscript Submission Information

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Keywords

  • waveguide-based sensors
  • optical waveguides
  • sensor technology
  • integrated photonics
  • biosensing applications
  • optoelectronic systems
  • refractive index sensors
  • fiber optic sensors
  • plasmonic waveguides
  • lab-on-a-chip systems

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Published Papers (2 papers)

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Research

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12 pages, 6370 KiB  
Communication
A 24 GHz End-Fire Rod Antenna Based on a Substrate Integrated Waveguide
by Yanfei Mao, Shiju E, Yu Zhang and Wen-cheng Lai
Sensors 2025, 25(5), 1636; https://doi.org/10.3390/s25051636 - 6 Mar 2025
Viewed by 742
Abstract
Most of the traditional rod antennas in the literature are in the shape of a cylinder or are conical, which are not suitable shapes for planar PCB technology or planar integrated CMOS or BiCMOS technology. In this paper, we present a 24 GHz [...] Read more.
Most of the traditional rod antennas in the literature are in the shape of a cylinder or are conical, which are not suitable shapes for planar PCB technology or planar integrated CMOS or BiCMOS technology. In this paper, we present a 24 GHz planar end-fire rod antenna based on an SIW (substrate integrated waveguide) suitable for planar PCB technology or planar integrated circuit technology. The antenna is made of PCB Rogers 4350 and utilizes the SIW to realize the end-fire rod antenna. The measurement results of the antenna are presented: its gain is 8.55 dB and its S11 bandwidth is 6.2 GHz. This kind of planar end-fire rod antenna possesses the characteristics of high gain, wide bandwidth, compactness, and simple design and structure. This type of antenna can also be used as a PCB antenna in other frequency bands, and it could also possibly be utilized in mm-wave and THz integrated antenna design in the future due to its very simple architecture. Full article
(This article belongs to the Special Issue Waveguide-Based Sensors and Applications)
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Review

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28 pages, 3787 KiB  
Review
Plasmonic Sensors Based on a Metal–Insulator–Metal Waveguide—What Do We Know So Far?
by Muhammad A. Butt
Sensors 2024, 24(22), 7158; https://doi.org/10.3390/s24227158 - 7 Nov 2024
Cited by 4 | Viewed by 1727
Abstract
Metal–insulator–metal (MIM) waveguide-based plasmonic sensors are significantly important in the domain of advanced sensing technologies due to their exceptional ability to guide and confine light at subwavelength scales. These sensors exploit the unique properties of surface plasmon polaritons (SPPs) that propagate along the [...] Read more.
Metal–insulator–metal (MIM) waveguide-based plasmonic sensors are significantly important in the domain of advanced sensing technologies due to their exceptional ability to guide and confine light at subwavelength scales. These sensors exploit the unique properties of surface plasmon polaritons (SPPs) that propagate along the metal–insulator interface, facilitating strong field confinement and enhanced light–matter interactions. In this review, several critical aspects of MIM waveguide-based plasmonic sensors are thoroughly examined, including sensor designs, material choices, fabrication methods, and diverse applications. Notably, there exists a substantial gap between the numerical data and the experimental verification of these devices, largely due to the insufficient attention given to the hybrid integration of plasmonic components. This disconnect underscores the need for more focused research on seamless integration techniques. Additionally, innovative light-coupling mechanisms are suggested that could pave the way for the practical realization of these highly promising plasmonic sensors. Full article
(This article belongs to the Special Issue Waveguide-Based Sensors and Applications)
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