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Photonics
Special Issues
Optically Active Nanomaterials for Sensing Applications
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Optically Active Nanomaterials for Sensing Applications

A special issue of Photonics (ISSN 2304-6732).

Deadline for manuscript submissions: closed (15 April 2023) | Viewed by 5476

Special Issue Editors

Dr. Akhilesh Pathak

E-Mail Website
Guest Editor
Center for Smart Structures and Materials, Department of Mechanical Engineering, Northwestern University, Evanston, IL 60208, USA
Interests: fiber bragg gratings (FBG); PCF; sensors; plasmonic; waveguide; optical fibers; optical fiber sensor; finite element method; FEM; simulation; SPR; FBG; MOF; Volatile Organic Compound (VOC); COMSOL; health; biosensors
Special Issues, Collections and Topics in MDPI journals
Dr. Rahul Kumar Gangwar

E-Mail Website
Guest Editor
Rajdhani College, University of Delhi, Delhi, India
Interests: optical sensors; plasmonic sensors; optical fiber sensors; photonic crystal fiber and its uses in various applications like communication, sensing and photonic devices etc

Special Issue Information

Dear Colleagues,

Since 1970, when the photonic device was introduced to the world, extensive research has been dedicated to this area, resulting in the broadening of their use from optical transmission waveguides in telecommunications to sensing devices. Recently, such devices become an integral part of our daily life due to their excellent feature of low cost, immunity to electromagnetic interference, rapid response, precise manufacturing, etc. Their demand as a sensing probe is increasing more specifically in pharmaceutical, clinical, military, and industrial applications. There are several steps have been considered in order to improve the sensitivity, selectivity, and response time for its real-world realization; among which the role of optically active materials attracts huge attention by researchers to provide an efficient and effective tool for the selective detection of protein, pathogen, viruses, etc. The sensing response is monitored by analyzing light-matter interaction which is strongly dependent on their surrounding environment. The change in the property of light is analyzed by analyzing transmitted/reflected, or diffracted light from such material, scattering phenomenon, changes of refractive index, pressure, temperature, humidity, or pH. A sensor utilizing such optically active material is one particularly hot research topic that can be considered as the future of sensing applications.

Dr. Akhilesh Pathak
Dr. Rahul Kumar Gangwar
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 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. 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 optics
  • photonics
  • nanomaterials
  • surface functionalization
  • sensing
  • surface plasmon resonance
  • polymer

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Published Papers (3 papers)

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Research

10 pages, 2940 KiB  
Communication
Intrusion Monitoring Based on High Dimensional Random Matrix by Using Ultra-Weak Fiber Bragg Grating Array
by Hongcan Gu, Junbing Huang, Su Wu, Ciming Zhou, Zhiqiang Zhang, Cong Liu and Yandong Pang
Photonics 2023, 10(7), 733; https://doi.org/10.3390/photonics10070733 - 27 Jun 2023
Viewed by 1214
Abstract
In order to ensure that a perimeter security system can work effectively, a convenient and effective event detection algorithm has an important engineering significance. Given the above background, in this paper, we propose a high reliability intrusion event recognition method and vibration sensing [...] Read more.
In order to ensure that a perimeter security system can work effectively, a convenient and effective event detection algorithm has an important engineering significance. Given the above background, in this paper, we propose a high reliability intrusion event recognition method and vibration sensing system, based on ultra-weak fiber Bragg grating array, by using high dimensional random matrix. We obtain a high sensitivity optical interference signal by constructing a patch-matched optical interference system, then compose the demodulated interference signal into a high-dimensional random matrix. The statistical characteristics of the matrix for the Marcenko-Pastur (M-P) law and ring law are used to confirm the presence of intrusion events efficiently, which can reflect the limit spectrum distribution of the high-dimensional random matrix; meanwhile, the abnormal state quantity and moment are obtained. Further, the average spectral radius value is used to judge the fault cause. Field experimental results show that the proposed method can effectively obtain the correct monitoring data for the sensor array. By comparing the monitoring results of normal operation and crusher operation, we can detect the intrusion event in 4.5 s, and the accuracy rate can reach more than 90%, which verifies that the proposed high-dimensional random matrix analysis method can work properly, proving a practical engineering application prospect. Full article
(This article belongs to the Special Issue Optically Active Nanomaterials for Sensing Applications)
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9 pages, 2248 KiB  
Communication
Development of Multiple Fano-Resonance-Based All-Dielectric Metastructure for High-Contrast Biomedical Applications
by Liping Bi, Xinye Fan, Shuangshuang Cao, Chuanchuan Li, Yingxin Yin, Hening Zhao, Wenjing Fang, Huijuan Niu, Chenglin Bai, Xin Wei and Santosh Kumar
Photonics 2023, 10(6), 616; https://doi.org/10.3390/photonics10060616 - 26 May 2023
Cited by 2 | Viewed by 1523
Abstract
In this paper, an all-dielectric metastructure-based high-contrast refractive index sensor is proposed. This structure can be utilized to detect various concentrations of glycerol-water mixtures by evaluating transmission spectral lines and resonant wavelength shifts related with liquid concentration detection. The experimental and calculated results [...] Read more.
In this paper, an all-dielectric metastructure-based high-contrast refractive index sensor is proposed. This structure can be utilized to detect various concentrations of glycerol-water mixtures by evaluating transmission spectral lines and resonant wavelength shifts related with liquid concentration detection. The experimental and calculated results of the developed sensor structure are able to excite three resonance peaks, demonstrating that the structure is capable of reaching excellent sensing capabilities. It has been established that this work has the potential to be useful in medical and biological detection; this is of great scientific and practical significance. Full article
(This article belongs to the Special Issue Optically Active Nanomaterials for Sensing Applications)
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13 pages, 7316 KiB  
Article
Development of Taper-in-Taper-Based Optical Fiber Sensors for Chemical and Biological Sensing
by Fei Liu, Wen Zhang, Xianzheng Lang, Xuecheng Liu, Ragini Singh, Guoru Li, Yiyan Xie, Bingyuan Zhang and Santosh Kumar
Photonics 2023, 10(5), 567; https://doi.org/10.3390/photonics10050567 - 11 May 2023
Cited by 3 | Viewed by 2033
Abstract
This paper presents the development of taper-in-taper fiber (TITF)–optical fiber-based sensors for chemical and biological detection. TITF structure is a fiber structure formed by fabricating a taper again on the taper region of the traditional taper fiber. The experimental results show that the [...] Read more.
This paper presents the development of taper-in-taper fiber (TITF)–optical fiber-based sensors for chemical and biological detection. TITF structure is a fiber structure formed by fabricating a taper again on the taper region of the traditional taper fiber. The experimental results show that the TITF structure has a lower transmitted intensity than the common taper fiber structure. It is demonstrated that the structure of TITF is more conducive to evanescent waves, thereby making it more sensitive to changes in the refractive index (RI) of the external environment. To confirm this, measurements of ethanol solutions with different water contents are taken using the TITF structure to showcase the chemical sensing, thus verifying its sensitivity to RI changes in the external environment. The sensor can measure ethanol solutions from 0 to 100% with a sensitivity of 4.06 a.u./%. Thereafter, the TITF sensor is modified with ZnO-NPs to enhance its sensitivity for biological sensing (creatinine detection). The transmitted intensity of different concentrations of creatinine solution (0–2000 μM) is measured using the proposed sensor. The sensor showed good linearity and a high sensitivity of 0.11 a.u./μM for creatinine solution. Therefore, it is demonstrated that the TITF sensor with ZnO-NPs can be used for effective biological sensing. Full article
(This article belongs to the Special Issue Optically Active Nanomaterials for Sensing Applications)
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