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Photonics
Special Issues
Photonics & Optical Fiber Sensors: Recent Advancements, Emerging Trends, and...
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Photonics & Optical Fiber Sensors: Recent Advancements, Emerging Trends, and Future Prospects

A special issue of Photonics (ISSN 2304-6732). This special issue belongs to the section "Lasers, Light Sources and Sensors".

Deadline for manuscript submissions: closed (31 December 2025) | Viewed by 2969

Special Issue Editors

Dr. Anubhav Srivastava

E-Mail Website
Guest Editor
Department of Engineering, University of Naples Parthenope, Centro Direzionale di Napoli, Isola C4, 80143 Naples, Italy
Interests: fiber optic sensors; long-period gratings; fiber Bragg gratings; biosensors; Interferometers; fiber chemical sensors; LMR; SERs; SPRs
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Agostino Iadicicco

E-Mail Website
Guest Editor
Department of Engineering, University of Naples Parthenope, Centro Direzionale di Napoli, Isola C4, 80143 Naples, Italy
Interests: fiber optics sensors; long period gratings; fiber bio-chemical sensors; LMR; SERs; SPR; specialty fiber sensors; optoelectronics
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Stefania Campopiano

E-Mail Website
Guest Editor
Department of Engineering, University of Naples Parthenope, Centro Direzionale di Napoli, Isola C4, 80143 Naples, Italy
Interests: photonics; fiber optics sensors; fiber bragg gratings; long period gratings; biomedical sensors; optoelectronic sensors; bandgap sensors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photonics and optical fiber sensing is a new generation of sensing technology that senses and transmits signals from external stimuli using optical fibers (or others) as the medium and optical waves or photons as the carrier. Due to its inherent benefits-such as its small size, light weight, cost-effectiveness, resistance to electromagnetic interference, high sensitivity and resolution measurements, resistance to harsh environments, excellent stability, chemical resistance, high multiplexing capability, and remote sensing ability-it has garnered a vast amount of attention in recent decades. It uses the physical characteristics of light as it passes through an optical fiber to detect changes in temperature, pressure, strain, and other environmental factors. Optical sensing domains are continuously evolving as a result of the growing need for high-performance measurement. Fiber optic sensors' adaptability in terms of both configuration and functionality makes them perfect fit for a variety of applications, including food processing, aerospace, environmental monitoring, medical diagnostics, industrial process control, homeland security, military defense, high energy physics experiments, and structural health monitoring.

This Special Issue will have a dedicated focus on the recent advancements, emerging trends and future prospective aspects in photonics and optical sensing covering theory, design and fabrication, modelling, and application etc. We encourage you to submit theoretical and experimental submissions of original articles, letters, and reviews to provide a useful insight into the current status and trends, and future aspects in this area. We look forward to receiving your contributions. 

Topics of interest include both research and reviews but are not limited to:

  1. Fiber optic sensors (Physical, chemical, biological)
  2. Fiber interferometric sensors
  3. Sensors based on resonance, plasmonics, surface enhanced phenomena
  4. Distributed fiber sensing
  5. Integrated photonics sensors
  6. Microfluidics
  7. Fiber Grating sensors
  8. Application of AI/ML in optical sensing

Dr. Anubhav Srivastava
Prof. Dr. Agostino Iadicicco
Prof. Dr. Stefania Campopiano
Guest Editors

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 250 words) can be sent to the Editorial Office for assessment.

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. Photonics is an international peer-reviewed open access monthly 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 2400 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

  • fiber optic sensor
  • fiber biosensor
  • fiber gratings
  • integrated photonics

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (2 papers)

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Research

12 pages, 3277 KB  
Article
Screening Effect Suppression and Radiation Performance Improvement in Photoconductive Terahertz Emitters with Metallic Nanoarray Structure
by Shihang Xu and Xiaolong Hu
Photonics 2025, 12(11), 1122; https://doi.org/10.3390/photonics12111122 - 14 Nov 2025
Viewed by 544
Abstract
As core components of terahertz (THz) radiation sources, photoconductive antennas (PCAs) suffer from performance limitations due to inefficient carrier generation/transport and space-charge shielding effects. This study first introduced cylindrical Au nanoarray structures within the electrode gaps of photoconductive antennas to enhance radiation performance. [...] Read more.
As core components of terahertz (THz) radiation sources, photoconductive antennas (PCAs) suffer from performance limitations due to inefficient carrier generation/transport and space-charge shielding effects. This study first introduced cylindrical Au nanoarray structures within the electrode gaps of photoconductive antennas to enhance radiation performance. A combination of the finite element method solver and COMSOL Multiphysics was implemented to refine the model by accounting for the shielding field, which is often neglected in the calculations. Guided by the theoretical and simulation model, the generated current, THz radiation power and the shielding field were comparatively studied in the plasmonic nanoarray PCA and traditional PCA without the plasmonic nanoarray structure. The results demonstrate that emitters with the cylindrical nanoarray structures achieve a radiation power 3.81 times higher than that of the traditional structure, along with a 50% broader bandwidth. Further optimization of photogenerated carrier distribution through engineered metallic nanoarray structures reveals that plasmonic photoconductive THz emitters with triangular nanoarrays reduce the space-charge shielding field by 28.7% compared to the cylindrical structures while enhancing the radiation field intensity by a factor of 1.21. This work presents an effective approach to designing high-performance photoconductive THz emitters, holding significant theoretical and practical significance. Full article
(This article belongs to the Special Issue Photonics & Optical Fiber Sensors: Recent Advancements, Emerging Trends, and Future Prospects)
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18 pages, 6306 KB  
Article
Spectral Envelope Analysis of Subwavelength Grating Waveguide Micro Racetrack Ring Resonator for Cancer Sensing Using Integrated Photonics
by Shalini Vardhan, Devansh Srivastava, Naveen Kumar Gupta, Ritu Raj Singh and Santosh Kumar
Photonics 2025, 12(4), 376; https://doi.org/10.3390/photonics12040376 - 14 Apr 2025
Cited by 5 | Viewed by 1769
Abstract
Silicon-on-Insulator (SOI) technology and optical resonators have significantly influenced the field of photonics for malignancy sensing. Cancer, a malignant disease, necessitates the precise and advanced diagnostic technique. This study introduces a novel approach for cancer detection utilizing a micro racetrack ring resonator (MRTRR) [...] Read more.
Silicon-on-Insulator (SOI) technology and optical resonators have significantly influenced the field of photonics for malignancy sensing. Cancer, a malignant disease, necessitates the precise and advanced diagnostic technique. This study introduces a novel approach for cancer detection utilizing a micro racetrack ring resonator (MRTRR) integrated with Subwavelength Gratings (SWGs). The grating pitch size (Λ) is 300 nm. The findings demonstrate that the SWG MRTRR achieves high Sensitivity (S) due to enhanced light matter interaction and weak mode confinement. The SWG MRTRR produces a spectral envelope as the transmission output, which eliminates the limitation of free spectral range (FSR). The ‘S’ values obtained for cervical cancer, breast cancer type-1, and breast cancer type-2 are 1825 nm/RIU, 1705.14 nm/RIU, and 1004.71 nm/RIU. The Q-factor and the intrinsic Limit of Detection (iLoD) values are 269.68, 280.78, 315.76, 3.28 × 10−3, 3.37 × 10−3, and 5.09 × 10−3, respectively. Full article
(This article belongs to the Special Issue Photonics & Optical Fiber Sensors: Recent Advancements, Emerging Trends, and Future Prospects)
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