Results 251 to 260 of about 90,518 (291)

Uncladded sensing fiber for refractive index measurement

AIP Conference Proceedings, 2016
The formation of chemically etched optical fiber for use in refractive index sensor is addressed. This presented design of a refractive index (RI) sensor is based on recording the power loss exhibited by radiation propagating through an etched multimode fiber (MMF) immersed in the liquid under study.
V. Bhardwaj, R. K. Gangwar, A. K. Pathak, V. K. Singh   +3 more
openaire   +1 more source

Fiber optic sensing of liquid refractive index

Sensors and Actuators B: Chemical, 2007
An optical fiber, partially stripped of its cladding is shown to sense refractive index of a liquid in which the uncladded sensing region is immersed, to a high degree of precision and over a wide range of refractive index. The slope of sensor response is found to be non linear, can have either sign and can change sign at around refractive index of the
Argha Banerjee, Sayak Mukherjee, Rishi Kumar Verma, Biman Jana, Tapan Kumar Khan, Mrinmoy Chakroborty, Rahul Das, Sandip Biswas, Ashutosh Saxena, Vandana Singh   +9 more
openaire   +1 more source

Refractive Index Sensing with Anisotropic Hyperbolic Metamaterials

2020
Metamaterials with hyperbolic dispersion based on metallic nanorod arrays provide a flexible platform for the design of bio- and chemical sensors and active nanophotonic devices that allow the incorporation of refractive-index-dependent materials into or on top of the metamaterial.
Nikolaos Vasilantonakis, Gregory A. Wurtz, Anatoly V. Zayats   +2 more
openaire   +1 more source

S-Fiber Probe for Refraction Index Sensing

2017
A 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.
Yang Xian-hui, Yang Rui, Gao Shuo, Gu Xue-mei, Yu Bo-tao, Zhang Shi-chuan   +5 more
openaire   +1 more source

Surface plasmon resonance optical cavity enhanced refractive index sensing

Optics Letters, 2013
We report on a method for surface plasmon resonance (SPR) refractive index sensing based on direct time-domain measurements. An optical resonator is built around an SPR sensor, and its photon lifetime is measured as a function of loss induced by refractive index variations.
A Giorgini, S Avino, P Malara, G Gagliardi, M Casalino, G Coppola, M Iodice, P Adam, K Chadt, J Homola, P De Natale   +10 more
openaire   +4 more sources

Circular dichroism based refractive index sensing using chiral metamaterials

Chemical Communications, 2016
A new strategy to improve the sensitivity of localized surface plasmon resonance sensors by employing chiral metamaterials is provided.
Yizhuo, He, Keelan, Lawrence, Whitney, Ingram, Yiping, Zhao   +3 more
openaire   +2 more sources

Refractive Index Sensing Using Quasi One-Dimensional Nanoslit Arrays

Nano Letters, 2009
This letter describes the optical properties of quasi one-dimensional (1D) Au nanoslit arrays on a microscale pitch. The transmission spectra exhibited multiple minima that were well characterized by 1D surface plasmon polariton Bloch wave modes. We found that all higher order modes showed a linear response to small changes of refractive index (RI ...
Min Hyung, Lee, Hanwei, Gao, Teri W, Odom   +2 more
openaire   +2 more sources

Polarization state-based refractive index sensing with plasmonic nanostructures

Nanoscale, 2015
A theoretical value of figure of merit exceeding 1700 is achieved with a polarization state-based refractive index sensing approach.
Shao-Ding, Liu, Xin, Qi, Wu-Chao, Zhai, Zhi-Hui, Chen, Wen-Jie, Wang, Jun-Bo, Han   +5 more
openaire   +2 more sources

An Introduction to Plasmonic Refractive Index Sensing

2012
This chapter introduces the basics of plasmon-based refractometric sensing, its application in label-free biomolecular analysis, and discusses differences between propagating plasmons and localized plasmons in terms of refractive index sensitivity, sensing volume and measurement methodology.
Mikael Svedendahl, Si Chen, Mikael Käll
openaire   +1 more source

Nonlinearly enhanced refractive index sensing in coupled optical microresonators

Optics Letters, 2013
We study the use of nonlinear self-phase modulation (SPM) in coupled optical microresonators for ultrasensitive refractive index sensing. SPM leads to a positive feedback enhancement of the resonance frequency shift caused by a perturbation of the index of refraction in a resonator.
Chao, Wang, Christopher P, Search
openaire   +2 more sources