Permittivity-asymmetric qBIC metasurfaces for refractive index sensing [PDF]
NanophotonicsBound states in the continuum (BICs) provide exceptional light confinement due to their inherent decoupling from radiative channels. Small symmetry breaking transforms BIC into quasi-BIC (qBIC) that couples to free-space radiation enabling ultra-high ...
Yang Xingye +3 more
doaj +4 more sources
Refractive-index sensing with ultra-thin plasmonic nanotubes [PDF]
Plasmonics, 2012 We study the refractive-index sensing properties of plasmonic nanotubes with a dielectric core and ultra-thin metal shell. The few-nm thin metal shell is described by both the usual Drude model and the nonlocal hydrodynamic model to investigate the ...
AD Boardman +31 more
core +3 more sources
Reflection-based fibre-optic refractive index sensor using surface plasmon resonance [PDF]
Journal of the European Optical Society-Rapid Publications, 2014 A reflection-based fibre-optic refractive index sensor using surface plasmon resonance (SPR) in a thin metal film sputtered on a bare core of a multimode optical fibre is presented.
Hlubina P. +3 more
doaj +5 more sources
Distributed Refractive Index Sensing Based on Etched Ge-Doped SMF in Optical Frequency Domain Reflectometry [PDF]
Sensors, 2023 A distributed optical fiber refractive index sensor based on etched Ge-doped SMF in optical frequency domain reflection (OFDR) was proposed and demonstrated. The etched Ge-doped SMF was obtained by only using wet-etching, i.e., hydrofluoric acid solution.
Cailing Fu +7 more
doaj +2 more sources
Plasmonic anapole metamaterial for refractive index sensing
PhotoniX, 2022 Electromagnetic anapole mode is a nonradiative state of light originating from the deconstructive interference of radiation of the oscillating electric and toroidal dipole moments.
Jin Yao +6 more
doaj +5 more sources
Whispering-Gallery Mode Micro-Ring Resonator Integrated with a Single-Core Fiber Tip for Refractive Index Sensing [PDF]
Sensors, 2023 A micro-ring resonator structure was fabricated via the two-photon polymerization technique directly on a single-mode fiber tip and tested for refractive index sensing application. The micro-ring structure was used to excite whispering-gallery modes, and
Monika Halendy, Sławomir Ertman
doaj +2 more sources
High sensitivity refractive index sensing using zone plate metasurfaces with a conical phase profile [PDF]
Scientific Reports, 2022 In this paper, we showed how a bulky Axicon lens can be transformed to a compact binary zone plate with conical phase profile. We built three zone plates made of three different materials and designed each zone plate to be used in high sensitivity ...
Manar Abdel-Galil +3 more
doaj +2 more sources
Fabry–Perot Resonance in 2D Dielectric Grating for Figure of Merit Enhancement in Refractive Index Sensing [PDF]
Sensors, 2021 We have recently reported in our previous work that one-dimensional dielectric grating can provide an open structure for Fabry–Perot mode excitation. The grating gaps allow the sample refractive index to fill up the grating spaces enabling the sample to ...
Suejit Pechprasarn +2 more
doaj +2 more sources
Strip-loaded Mach-Zehnder interferometer for absolute refractive index sensing. [PDF]
Sci RepAbstractThis paper presents the design, fabrication, and characterization of a Mach–Zehnder interferometer (MZI) on a strip-loaded platform specifically developed for the measurement of refractive index variations in liquids. A novel approach of large opening in the sensing region enhances the sensitivity by using the analyte as the loading strip. This
Doughan I +3 more
europepmc +4 more sources
Optical Waveguide Refractive Index Sensor for Biochemical Sensing
Applied Sciences, 2023 This study describes the basic principles of optical waveguide refractive index sensing and the various design structures of refractive index sensors. These waveguides generate different optical resonances, which cause changes in the sensing refractive ...
Cheng Peng +7 more
doaj +1 more source