Work

Tunable Diode Laser Plasmonic Grating Spectroscopy for Hydrogen Sensing

Year: 2025

Type: article

Abstract: The design and development of portable plasmonic embedded measurement systems represents a significant engineering challenge, aimed at delivering the high sensitivities observed in devices based on such physical phenomena to field applications. This work proposes the Tunable Diode Laser Plasmonic Grating Spectroscopy technique to achieve a system architecture in which narrower resonances observed in metallic diffraction gratings enable the spectral detection of analytes. The primary application investigated is hydrogen sensing using Palladium (Pd) and Niobium (Nb) hydride-forming structures. Analytical and numerical simulations are employed to assess the influence of hydrogen gas presence on the metal dielectric function and structural parameters. It is demonstrated that highly linear detection can be achieved using spectral detection systems, and in the case of a Nb grating on a flexible substrate, a theoretical 55 ppm limit of detection is attainable.

Source: IEEE photonics journal

DOI: 10.1109/jphot.2025.3567000

Authors: Gabriel de Freitas Fernandes, Ignacio Llamas Garro, Joaquim Ferreira Martins Filho, Eduardo Fontana

Institutions: Universidade Federal de Pernambuco, Centre Tecnologic de Telecomunicacions de Catalunya

Language: English

Topic: Plasmonic and Surface Plasmon Research

Subfield: Biomedical Engineering

Field: Engineering

Domain: Physical Sciences

Open Access status: gold

Estimated APC paid: $2,075

OpenAlex ID: W4410086863

FWCI: 0.482

Cites: 47

Cited by: 2

Related to: 10