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Recent Trends and Advances in Optical Biosensors
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Recent Trends and Advances in Optical Biosensors

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

Deadline for manuscript submissions: closed (15 January 2024) | Viewed by 1409

Special Issue Editor

Dr. Yunyun Huang

E-Mail Website
Guest Editor
Institute of Photonics Technology, Jinan University, Guangzhou 510632, China
Interests: optical fiber sensors; biosensors; plasmon; interface

Special Issue Information

Dear Colleagues,

In numerous fields such as medical diagnosis, environmental monitoring, or quality control in the food industry, the rapid and accurate detection of analytes is crucial. Optical biosensors, which are not complex and can be used during pretreatment and have a probable influence on the nature of target molecules, have the advantages of high sensitivity, robustness, and the potential to be integrated, making them good candidates for the detection of these analytes in small concentrations.

This Special Issue aims to address the recent trends and advances in all types of optical biosensors.

Dr. Yunyun Huang
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

  • optical fiber biosensors
  • lab-on-chip
  • label-free biosensing
  • plasmonic biosensors
  • fluorescence
  • imaging
  • advances
  • challenges

Published Papers (1 paper)

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Research

13 pages, 1000 KiB  
Communication
Mid-Infrared Gas Sensing Based on Electromagnetically Induced Transparency in Coupled Plasmonic Resonators
by Sarah Shafaay, Sherif Mohamed and Mohamed Swillam
Sensors 2023, 23(22), 9220; https://doi.org/10.3390/s23229220 - 16 Nov 2023
Cited by 4 | Viewed by 860
Abstract
The existence of surface plasmon polaritons in doped silicon micro-scale structures has opened up new and innovative possibilities for applications, such as sensing, imaging, and photonics. A CMOS-compatible doped Si plasmonic sensor is proposed and investigated. The plasmon resonance can be tuned by [...] Read more.
The existence of surface plasmon polaritons in doped silicon micro-scale structures has opened up new and innovative possibilities for applications, such as sensing, imaging, and photonics. A CMOS-compatible doped Si plasmonic sensor is proposed and investigated. The plasmon resonance can be tuned by controlling the carrier density and dopant concentration. In this paper, we demonstrate that using silicon doped with phosphorus at a concentration of 5 × 1020 cm−3 can induce surface plasmon resonance in the mid-infrared region. Two ring resonators of two different radii based on metal–insulator–metal waveguide structures are studied individually. Then, the two ring resonators are integrated in the same device. When the two ring resonators are coupled and resonate at the same frequency; two distinct resonance spectral lines are generated with striking features that improve its potential use for sensing and modulation applications. The propagating plasmonic mode is studied, including its mode profile and bend loss. We evaluate the effectiveness of a microstructure gas sensor with dimensions of 15 μm × 15 μm by measuring its sensitivity and selectivity towards methane and ethane gases. Small alterations in the surrounding refractive index led to noticeable shifts in the resonance peak. The sensor achieved a sensitivity of 7539.9 nm/RIU at the mid-infrared spectral range around the 7.7 μm wavelength. Furthermore, by combining the resonators, we can achieve a smaller full width at half maximum (FWHM), which will ultimately result in greater sensitivity than using a single-ring resonator or other plasmonic resonator configurations. Once the sensitivity and selectivity of the sensor are measured, the FOM can be calculated by dividing the sensitivity by the selectivity of the sensor, resulting in an FOM of 6732. Full article
(This article belongs to the Special Issue Recent Trends and Advances in Optical Biosensors)
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