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Sensors
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Research Development in Terahertz and Infrared Sensing Technology
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Research Development in Terahertz and Infrared Sensing Technology

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

Deadline for manuscript submissions: 30 June 2024 | Viewed by 838

Special Issue Editors

Prof. Dr. Antonello Andreone

E-Mail Website
Guest Editor
Dipartimento di Fisica, Università di Napoli “Federico II”, Piazzale Tecchio 80, I-80125 Naples, Italy
Interests: material science; high-frequency spectroscopy; metamaterials and metasurfaces
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Stefano Lupi

E-Mail Website
Guest Editor
TeraLab Laboratory and SISSI and TeraFermi@Elettra, Department of Physics, Sapienza University of Rome, 00185 Rome, Italy
Interests: THz radiation; Pump-Probe spectroscopy; plasmonics; metal-insulator transition; optical spectroscopy; nanomicroscopy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Terahertz and infrared sensing technologies have revolutionized the way we perceive and interact with our surroundings. The recent advances in these technologies have revealed new opportunities for sensing and imaging techniques both in fundamental and applied science. In particular, the applications of such technologies range from security and surveillance to industrial quality control, medical diagnostics, and environmental monitoring. Finally, quantum sensing may gain a further boost through the use of terahertz and infrared radiation. In this general framework, we believe that terahertz and infrared sensing technologies hold significant potential for various sectors, paving the way for innovative solutions and advancements.

This Special Issue of Sensors, entitled “Development of Research in Terahertz and Infrared Sensing Technology”, will focus on all aspects of basic research and applications related to these areas. Both reviews and original research articles will be welcomed, and we look forward to your participation in this Special Issue.

Prof. Dr. Antonello Andreone
Prof. Dr. Stefano Lupi
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. 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

  • spectral imaging
  • spectroscopy
  • terahertz and infrared sensing technology and applications
  • infrared and terahertz metamaterial-based sensing
  • infrared photonics for sensing
  • terahertz radiation sources and detectors
  • novel terahertz and infrared sources for sensing.

Published Papers (1 paper)

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Research

13 pages, 3573 KiB  
Article
High-Density Polyethylene Custom Focusing Lenses for High-Resolution Transient Terahertz Biomedical Imaging Sensors
by Debamitra Chakraborty, Robert Boni, Bradley N. Mills, Jing Cheng, Ivan Komissarov, Scott A. Gerber and Roman Sobolewski
Sensors 2024, 24(7), 2066; https://doi.org/10.3390/s24072066 - 24 Mar 2024
Viewed by 549
Abstract
Transient terahertz time-domain spectroscopy (THz-TDS) imaging has emerged as a novel non-ionizing and noninvasive biomedical imaging modality, designed for the detection and characterization of a variety of tissue malignancies due to their high signal-to-noise ratio and submillimeter resolution. We report our design of [...] Read more.
Transient terahertz time-domain spectroscopy (THz-TDS) imaging has emerged as a novel non-ionizing and noninvasive biomedical imaging modality, designed for the detection and characterization of a variety of tissue malignancies due to their high signal-to-noise ratio and submillimeter resolution. We report our design of a pair of aspheric focusing lenses using a commercially available lens-design software that resulted in about 200 × 200-μm2 focal spot size corresponding to the 1-THz frequency. The lenses are made of high-density polyethylene (HDPE) obtained using a lathe fabrication and are integrated into a THz-TDS system that includes low-temperature GaAs photoconductive antennae as both a THz emitter and detector. The system is used to generate high-resolution, two-dimensional (2D) images of formalin-fixed, paraffin-embedded murine pancreas tissue blocks. The performance of these focusing lenses is compared to the older system based on a pair of short-focal-length, hemispherical polytetrafluoroethylene (TeflonTM) lenses and is characterized using THz-domain measurements, resulting in 2D maps of the tissue refractive index and absorption coefficient as imaging markers. For a quantitative evaluation of the lens effect on the image resolution, we formulated a lateral resolution parameter, R2080, defined as the distance required for a 20–80% transition of the imaging marker from the bare paraffin region to the tissue region in the same image frame. The R2080 parameter clearly demonstrates the advantage of the HDPE lenses over TeflonTM lenses. The lens-design approach presented here can be successfully implemented in other THz-TDS setups with known THz emitter and detector specifications. Full article
(This article belongs to the Special Issue Research Development in Terahertz and Infrared Sensing Technology)
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