Results 31 to 40 of about 247,892 (261)

A Review: Evolution and Diversity of Optical Fibre Plasmonic Sensors

open access: yesSensors, 2019
The purpose of this review is to bring to the attention of the wider research community how two quite different optical sensory techniques were integrated resulting in a sensor device of exceptional sensitivity with wide ranging capability.
Thomas Allsop, Ron Neal
doaj   +1 more source

Dynamic Control of Light Direction Enabled by Stimuli‐Responsive Liquid Crystal Gratings

open access: yesAdvances in Materials, 2018
The ability to control light direction with tailored precision via facile means is long‐desired in science and industry. With the advances in optics, a periodic structure called diffraction grating gains prominence and renders a more flexible control ...
R. Zola   +5 more
semanticscholar   +1 more source

Transmission Resonances on Metallic Gratings with Very Narrow Slits [PDF]

open access: yes, 1999
For decades, it has been thought that subwavelength apertures have a very low transmission efficiency of light [1]. However, very recently, several experiments have shown that, if holes are structured forming a 2D periodic array in a metallic film ...
J. Porto   +3 more
semanticscholar   +1 more source

Generation of Color Images by Utilizing a Single Composite Diffractive Optical Element

open access: yesMicromachines, 2018
This paper presents an approach that is capable of producing a color image using a single composite diffractive optical element (CDOE). In this approach, the imaging function of a DOE and the spectral deflection characteristics of a grating were combined
Jiazhou Wang   +8 more
doaj   +1 more source

Widely Tunable Near-Infrared Wavelength Conversion Based on Central and Off-Central Multiperiod Grating Pumped by a Compact Fiber Laser

open access: yesIEEE Access, 2021
Tunable near-infrared sources are highly demanded due to their various applications in biomedicine, printing, barcode technology, and optical storage. In this paper, widely central phase-matching wavelength tunable and high efficiency are demonstrated in
Wen Liu, Shuanggen Zhang, Jinlei Liu
doaj   +1 more source

Rapidly reconfigurable optical phase encoder-decoders based on fiber Bragg gratings [PDF]

open access: yes, 2006
We demonstrate the capacity for fast dynamic reconfiguration of optical code-division multiple access (OCDMA) phase en/decoders based on fiber Bragg gratings and a thermal phase-tuning technique.
Mokhtar, M.R.   +5 more
core   +1 more source

Biosensing with optical fiber gratings

open access: yes, 2017
Optical fiber gratings (OFGs), especially long-period gratings (LPGs) and etched or tilted fiber Bragg gratings (FBGs), are playing an increasing role in the chemical and biochemical sensing based on the measurement of a surface refractive index (RI ...
F. Chiavaioli   +4 more
semanticscholar   +1 more source

Study of the dynamic formation of transmission gratings recorded in photopolymers and holographic polymer-dispersed liquid crystals [PDF]

open access: yes, 2004
Local and nonlocal models for the diffusion of photopolymers are applied to the dynamic formation of transmission gratings recorded in photopolymers and holographic polymer-dispersed liquid crystals (H-PDLCs). We retrieve the main parameters of H-PDLCs (
Kaiser, Jean-Luc   +5 more
core   +1 more source

Single-Shot Phase-Contrast Imaging with a Single Grating

open access: yesPhotonics, 2023
In the field of X-ray phase-contrast imaging, a time-saving approach and preservation of details are crucial factors for obtaining phase-contrast images.
Xin Liu   +4 more
doaj   +1 more source

Dual-Wavelength Spectroscopy of a Metallic-Grating-Coupled Surface Plasmon Resonance Biosensor

open access: yesIEEE Photonics Journal, 2015
A novel approach is proposed to decouple the surface and bulk effects in surface plasmon resonance (SPR) biosensors. This method is based on a metallic-grating-based SPR in which a sensor is efficiently optimized to excite three surface plasmon waves at ...
Farshid Bahrami   +2 more
doaj   +1 more source

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