Results 31 to 40 of about 130,227 (299)

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

Engineered plasmon focusing on functional gratings [PDF]

open access: yes, 2005
We report on the engineering of plasmon propagation and focusing by dedicated curved gratings and noncollinear phasematching. Gratings were created on gold by focused ion beam milling and plasmons were measured using phase sensitive ...
Bergen, B. van den   +2 more
core   +5 more sources

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

Chirped-grating output couplers in dielectric waveguides [PDF]

open access: yes, 1977
This paper reports on the method of fabrication and first experiments of chirped (variable period) gratings in a dielectric waveguide. Such gratings, which are proposed as a new optical building block, are used in this work as focusing output ...
Katzir, A., Livanos, A. C., Yariv, A.
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

A Review: Application and Implementation of Optic Fibre Sensors for Gas Detection

open access: yesSensors, 2021
At the present time, there are major concerns regarding global warming and the possible catastrophic influence of greenhouse gases on climate change has spurred the research community to investigate and develop new gas-sensing methods and devices for ...
Thomas Allsop, Ronald Neal
doaj   +1 more source

Nanofibers with Bragg gratings from equidistant holes

open access: yes, 2011
We study nanofibers with Bragg gratings from equidistant holes. We calculate analytically and numerically the reflection and transmission coefficients for a single grating and also for a cavity formed by two gratings.
Hakuta, K., Kien, Fam Le, Nayak, K. P.
core   +1 more source

RETRACTED: Hu, H.; Bayanheshig. Exploration of a Flexible Metasurface for Strain Sensors: A Perspective from 2D Grating Fabrication to Spectral Characterization. Appl. Sci. 2022, 12, 10007

open access: yesApplied Sciences
The journal retracts and remove the article “Exploration of a Flexible Metasurface for Strain Sensors: A Perspective from 2D Grating Fabrication to Spectral Characterization” [...]
Hao Hu, Bayanheshig
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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