Results 51 to 60 of about 90,518 (291)

Optimisation of distributed feedback laser biosensors [PDF]

, 2007
A new integrated optical sensor chip is proposed, based on a modified distributed- feedback (DFB) semiconductor laser. The semiconductor layers of different refractive indices that comprise a laser form the basis of a waveguide sensor, where changes in ...
Coote, J, Reddy, Subrayal M, Sweeney, SJ
core   +1 more source

Photonic Crystal Fiber Modal Interferometer for Refractive Index Sensing

Communications, 2013
We present a modification of core-cladding intermodal interferometer for refractive index sensing. Its structure consists of double cladding photonic crystal fiber (PCF) as a sensing element.
Daniel Kacik, Peter Tatar
doaj   +1 more source

A Reconfigurable Terahertz Metamaterial Absorber for Gas Sensing Applications

Crystals, 2023
Reconfigurable metamaterials have immense applications in sensing. A refractive index reconfigurable terahertz metamaterial absorber was investigated in this research for gas sensing applications.
Shruti, Sasmita Pahadsingh, Bhargav Appasani, Avireni Srinivasulu, Nicu Bizon, Phatiphat Thounthong   +5 more
doaj   +1 more source

Wide-Range Optical CMOS-Based Diagnostics [PDF]

, 2017
Colorimetric, chemiluminescence and refractive index based diagnostics are some of the most important sensing techniques in biomedical science and clinical medicine.
Al-Rawhani, Mohammed A., Beeley, James, Cheah, Boon Chong, Cumming, David R.S., Giagkoulovits, Christos, Nagy, Bence, Shakoor, Abdul   +6 more
core   +1 more source

Fiber Optic-Based Refractive Index Sensing at INESC Porto [PDF]

Sensors, 2012
A review of refractive index measurement based on different types of optical fiber sensor configurations and techniques is presented. It addresses the main developments in the area, with particular focus on results obtained at INESC Porto, Portugal. The optical fiber sensing structures studied include those based on Bragg and long period gratings, on ...
Pedro A. S. Jorge, Susana O. Silva, Carlos Gouveia, Paula Tafulo, Luis Coelho, Paulo Caldas, Diana Viegas, Gaspar Rego, José M. Baptista, José L. Santos, Orlando Frazão   +10 more
openaire   +3 more sources

Lessons Learned: Quality Analysis of Optical Coherence Tomography in Neuromyelitis Optica

Annals of Clinical and Translational Neurology, EarlyView.
ABSTRACT Introduction Optical coherence tomography (OCT)‐derived retina measurements are markers for neuroaxonal visual pathway status. High‐quality OCT scans are essential for reliable measurements, but their acquisition is particularly challenging in eyes with severe visual impairment, as often observed in neuromyelitis optica spectrum disorders ...
Hadi Salih, Sara Samadzadeh, Charlotte Bereuter, Seyedamirhosein Motamedi, Claudia Chien, Pablo Villoslada, Hadas Stiebel‐Kalish, Nasrin Asgari, Yang Mao‐Draayer, Marius Ringelstein, Joachim Havla, Marco Aurélio Lana Peixoto, Ho Jin Kim, Jacqueline Palace, Maria Isabel Leite, Srilakshmi M. Sharma, Fereshteh Ashtari, Rahele Kafieh, Lekha Pandit, Orhan Aktas, Philipp Albrecht, Letizia Leocani, Itay Lotan, Sasitorn Siritho, Jérôme de Seze, Romain Marignier, Caroline Froment Tilikete, Denis Bernardi Bichuetti, Ivan Maynart Tavares, Ayse Altintas, Anu Jacob, Saif Huda, Ibis Soto de Castillo, Lawrence J. Cook, Michael R. Yeaman, Axel Petzold, Alexander U. Brandt, Friedemann Paul, Frederike C. Oertel, Hanna G. Zimmermann, with the Guthy Jackson Charitable Foundation—International Clinical Consortium and CROCTINO Collaborators   +40 more
wiley   +1 more source

Research on D-Shape Open-Loop PCF Temperature Refractive Index Sensor Based on SPR Effect

IEEE Photonics Journal, 2022
PCF (Photonic crystal fiber) temperature refractive index sensor based on SPR effect with the new double membrane open-loop structure is proposed. The inner surface of such PCF’s open-loop structure is plated with a layer of 70 nm gold film, and a
Fanlong Meng, Hong Wang, Di Fang
doaj   +1 more source

A tunable plasmonic refractive index sensor with nanoring-strip graphene arrays

, 2018
In this paper, a tunable plasmonic refractive index sensor with nanoring-strip graphene arrays is numerically investigated by the finite difference time domain (FDTD) method.
Cen, Chunlian, Chen, Xifang, Huang, Jing, Liang, Cuiping, Lin, Hang, Liu, Jiangwei, Tang, Yongjian, Xiao, Shuyuan, Ye, Xin, Yi, Yong, Yi, Zao   +10 more
core   +1 more source

A Q‐Learning Algorithm to Solve the Two‐Player Zero‐Sum Game Problem for Nonlinear Systems

International Journal of Adaptive Control and Signal Processing, Volume 39, Issue 3, Page 566-581, March 2025.
A Q‐learning algorithm to solve the two‐player zero‐sum game problem for nonlinear systems. ABSTRACT This paper deals with the two‐player zero‐sum game problem, which is a bounded L2$$ {L}_2 $$‐gain robust control problem. Finding an analytical solution to the complex Hamilton‐Jacobi‐Issacs (HJI) equation is a challenging task.
Afreen Islam, Anthony Siming Chen, Guido Herrmann   +2 more
wiley   +1 more source

Quantum dot-embedded microspheres for remote refractive index sensing [PDF]

Applied Physics Letters, 2008
We present a refractometric sensor based on quantum dot-embedded polystyrene microspheres. Optical resonances within a microsphere, known as whispering-gallery modes (WGMs), produce narrow spectral peaks. For sensing applications, spectral shifts of these peaks are sensitive to changes in the local refractive index.
Shuo, Pang, Richard E, Beckham, Kenith E, Meissner   +2 more
openaire   +2 more sources