Results 21 to 30 of about 22,692 (256)

Proposing a THz refractive index sensor based on the excitation of SPPs with an InSb cylinder [PDF]

open access: yesAUT Journal of Electrical Engineering, 2023
A novel metamaterial absorber sensor has been proposed for refractive index measurement in the range of [1-2] for the THz frequency band. This structure is based on using a plasmonic coaxial resonator which is excited by an InSb cylinder. Surface Plasmon
Sajedeh Zamani Noughabi   +2 more
doaj   +1 more source

Investigation of Silicon Core-Based Fiber Bragg Grating for Simultaneous Detection of Temperature and Refractive Index

open access: yesSensors, 2023
In this article, we theoretically designed and simulated a silicon core fiber for the simultaneous detection of temperature and refractive index. We first discussed the parameters of the silicon core fiber for near single-mode operation.
Yi-Lin Yu   +4 more
doaj   +1 more source

Optofluidic Micromachined Platform for Refractive Index Measurement

open access: yesChemosensors, 2022
We present a combination of micromachined optofluidic platforms equipped with a fiber-optic sensing configuration based on a three-path Mach–Zehnder interferometer (MZI) for simultaneous measurement of the refractive index of liquids and the ...
Zoran Djinović   +2 more
doaj   +1 more source

Terahertz Guided Mode Resonance Sensing Platform Based on Freestanding Dielectric Materials: High Q-Factor and Tunable Spectrum

open access: yesApplied Sciences, 2020
We theoretically investigated a polyethylene-based rectangular and guided mode resonance (GMR) structure with a circular pattern by using the finite-difference time-domain (FDTD) method in the terahertz region.
Hee Jun Shin, Gyeongsik Ok
doaj   +1 more source

Hybrid Plasmonic Modes for Enhanced Refractive Index Sensing

open access: yesAdvanced Sensor Research, 2023
AbstractCompared to single nanoparticles, strongly coupled plasmonic nanoparticles provide attractive advantages owing to their ability to exhibit multiple resonances with unique spectral features and higher local field intensity. These enhanced plasmonic properties of coupled metal nanoparticles have been used for various applications including ...
Bereket Dalga Dana   +5 more
openaire   +3 more sources

A Plasmonic Refractive Index Sensor Using a Water-Based Metamaterial Absorber [PDF]

open access: yesAUT Journal of Electrical Engineering, 2023
A structure for refractive index sensing application in THz band is proposed and analyzed in this paper. This structure is comprised of a golden plasmonic metamaterial absorber in which water is used as a dielectric and a thin TOPAS layer-which does not ...
Sajedeh Zamani Noughabi   +2 more
doaj   +1 more source

Refractive index sensing with Fano resonances in silicon oligomers [PDF]

open access: yesPhilosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2017
We demonstrate experimentally refractive index sensing with localized Fano resonances in silicon oligomers, consisting of six disks surrounding a central one of slightly different diameter. Owing to the low absorption and narrow Fano-resonant spectral features appearing as a result of the interference of the modes of the outer and ...
Katie E. Chong   +7 more
openaire   +3 more sources

Design and analysis of an ultra-high sensitive and tunable metal-insulator-metal waveguide-coupled octagonal ring resonator utilizing gold nanorods

open access: yesSensing and Bio-Sensing Research, 2022
In this research paper, we propose a refractive index (RI) based plasmonic nanosensor comprising of metal-insulator-metal (MIM) waveguide and octagonal resonator embedded with gold nanorods.
Nasir Muhammad Munim   +3 more
doaj   +1 more source

Monodisperse Gold Nanorods for High-Pressure Refractive Index Sensing [PDF]

open access: yesThe Journal of Physical Chemistry Letters, 2019
The effects of hydrostatic pressure on the surface plasmon resonances (SPRs) of aqueous dispersions of monodisperse gold nanorods (AuNRs) were determined up to 9 GPa. The ultranarrow longitudinal SPR band of monodisperse AuNRs allows us to monitor a gradual red shift with pressure, which shows abrupt jumps at the liquid to ice phase VI and ice phase ...
Camino Martín-Sánchez   +5 more
openaire   +2 more sources

Refractive-index-based ultrasound sensing with photonic crystal slabs [PDF]

open access: yesOptics Letters, 2019
5 pages, 4 figures, 1 ...
Zhu, Eric Y.   +4 more
openaire   +3 more sources

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