Results 41 to 50 of about 90,518 (291)
Fibre-optic sensor for simultaneous measurement of thickness and refractive index of liquid layers [PDF]
Metrology and Measurement Systems, 2019 In this paper, we present a fibre-optic sensor for simultaneous measurement of refractive index and thickness of liquid layers.We designed an experimental low-coherence setup with two broadband light sources and an extrinsic fibre-optic Fabry–Pérot ...
Marcin Marzejon +3 more
doaj +1 more source
High-Q ring resonators in thin silicon-on-insulator [PDF]
, 2004 We have fabricated high-Q microrings from thin silicon-on-insulater SOI layers and measured Q values of 45 000 in these rings, which were then improved to 57 000 by adding a PMMA cladding.
Baehr-Jones, Tom +3 more
core +1 more source
Photonic Crystal Fiber SPR Liquid Sensor Based on Elliptical Detective Channel
Micromachines, 2021 This paper proposes a Photonic Crystal Fiber (PCF) refractive index sensor model based on the surface plasmon resonance effect. The proposed PCF model also uses the full vector finite element method to transfer the structure under the anisotropic Perfect
Xin Yan +3 more
doaj +1 more source
Optical waveguides with compound multiperiodic grating nanostructures for refractive index sensing [PDF]
, 2016 The spectral characteristics and refractive index sensitivity of compound multiperiodic grating waveguides are investigated in theory and experiment. Compound gratings are formed by superposition of two or more monoperiodic gratings.
Adam, Jost +3 more
core +4 more sources
Polarization vortex for enhanced refractive index sensing
Optics ExpressAlthough all-dielectric sensors exhibit minimal absorption and a high figure of merit (FOM), their sensitivity is significantly lower compared to plasmonic sensors. One approach to enhancing the sensitivity of dielectric sensors is to utilize bound states in the continuum (BICs), which are resonant states with an infinite radiative lifetime.
Ravshanjon Nazarov +3 more
openaire +2 more sources
Refractive index sensing with Fano resonances in silicon oligomers [PDF]
Philosophical 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 the ...
Katie E. Chong +7 more
openaire +3 more sources
Sensors, 2016 We report the optimization of the length of a D-shaped plastic optical fiber (POF) sensor for refractive index (RI) sensing from a numerical and experimental point of view. The sensing principle is based on total internal reflection (TIR). POFs with 1 mm
Filipa Sequeira +6 more
doaj +1 more source
Nanoscale Refractive Index Sensors Based on Fano Resonance Phenomena
Photonics, 2022 In this paper, a new refractive index sensor based on Fano resonance is introduced. It is mainly composed of two parts: a metal–insulator–metal as a base waveguide and an annular resonant cavity with a double notch and a double convex circle as a ...
Yifeng Ren +8 more
doaj +1 more source
Real-Time and In-Flow Sensing Using a High Sensitivity Porous Silicon Microcavity-Based Sensor
Sensors, 2017 Porous silicon seems to be an appropriate material platform for the development of high-sensitivity and low-cost optical sensors, as their porous nature increases the interaction with the target substances, and their fabrication process is very simple ...
Raffaele Caroselli +5 more
doaj +1 more source
Integrated collinear refractive index sensor with Ge PIN photodiodes
, 2018 Refractive index sensing is a highly sensitive and label-free detection method for molecular binding events. Commercial implementations of biosensing concepts based on plasmon resonances typically require significant external instrumentation such as ...
Augel, Lion +6 more
core +2 more sources