Results 211 to 220 of about 23,722 (255)
Refractive index sensing with optical bound states in the continuum
Optics Express, 2020 We consider refractive index sensing with optical bounds states in the continuum (BICs) in dielectric gratings. Applying a perturbative approach we derived the differential sensitivity and the figure of merit of a sensor operating in the spectral vicinity of a BIC. Optimisation design approach for engineering an effective sensor is proposed.
Valeriy S Gerasimov +2 more
exaly +4 more sources
Refractive-Index Sensing with Ultrathin 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 effects of nonlocality.
Giuseppe Toscano +2 more
exaly +4 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
Nunzio Cennamo, Luigi Zeni, Lúcia Bilro
exaly +3 more sources
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Refractive index sensing by a silicon metasurface
2022 IEEE 21st Mediterranean Electrotechnical Conference (MELECON), 2022The availability of smart materials represents a key enabling milestone for the realization of smart sensors. In this research field, optical sensing has gained a lot of attention in various applications ranging from basic physics to chemistry and biology.
Rocco D. +6 more
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Refractive index sensor for sensing high refractive index bioliquids at the THz frequency
Journal of the Optical Society of America B, 2021In this paper, a highly sensitive and low loss refractive index (RI) biosensor for high RI bio-analytes detection, such as for cholesterol, nicotine, and bacillus bacteria, is proposed. A novel, to the best of our knowledge, decagonal structure with porous core photonic crystal fiber (PC-PCF) is introduced.
Amit Kumar, Pankaj Verma, Poonam Jindal
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Refractive index sensing and switching of leaky states in a metasurface
Optics Letters, 2021We theoretically propose leaky states in an electro-optic (EO)-based all-dielectric metasurface. The EO substrate tunes leaky modes to the desired wave band with changes in applied voltage ( V a p p ).
Naseer Muhammad, Guo Ping Wang
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Twisted Optical Microfibers for Refractive Index Sensing
IEEE Photonics Technology Letters, 2011A simple, compact, and robust refractive index sensor is developed, by twisting a pair of silica microfibers to form a coupling device. The transmission spectrum of the device is highly sensitive to the surrounding refractive index and the highest sensitivity obtained is -2377 nm/refractive index unit (RIU), at the refractive index value of - 1.3680 ...
Changrui Liao +3 more
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Sensing the refractive index gradient of the atmosphere
SPIE Proceedings, 2006The refractive index gradient, averaged over short horizontal paths, in the atmosphere was experimentally investigated by using a method we developed, based on the use of thin parallel laser beams. Horizontal and vertical components of the gradient were shown to be directly related to the corresponding lateral displacements of the beams at the end of ...
Anna Consortini +2 more
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S-Fiber Probe for Refraction Index Sensing
2017A refractive index (RI) sensor which based on an S-tapered fiber probe (STFP) with a silver mirror on its end facet is demonstrated. The fiber probe has a compact size of about 1 mm, making it proper for sensing in narrow or limited space. It is stiff to bend due to the short probe structure, leading to avoid the cross-sensitivity of bending.
Xian Hui Yang +5 more
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Hybrid Metal-Dielectric Metasurfaces for Refractive Index Sensing
Nano Letters, 2020Hybrid metal-dielectric nanostructures have recently gained prominence because they combine strong field enhancement of plasmonic metals and the several low-loss radiation channels of dielectric resonators, which are qualities pertaining to the best of both worlds.
Debdatta Ray +5 more
openaire +5 more sources