Results 31 to 40 of about 179,886 (315)

Generation of High-Power Bottle Beams and Autofocusing Beams

open access: yesIEEE Photonics Journal, 2018
We propose and experimentally demonstrate an optical bottle beam (BB) and an abruptly autofocusing beam (AB), which were generated using a ring-Airy beam array.
Yixian Qian, Songtao Lai, Hongxing Mao
doaj   +1 more source

Optical design of SPIDERS, a Subaru Pathfinder Instrument for Detecting Exoplanets & Retrieving Spectra

open access: yes, 2022
NRC’s NEW-EARTH Lab has demonstrated in the laboratory a Self-Coherent Camera (SCC) concept combined with a Tilt-Gaussian-Vortex focal plane mask (FPM). This speckle suppression technique, a.k.a.
N'diaye, Mamadou   +11 more
core   +1 more source

AN ALGORITHM FOR AUTOMATED DETECTION OF DELAYED BRAIN ISCHEMIA INDICATOR FROM VIDEO-EEG MONITORING DATA [PDF]

open access: yesThe International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, 2023
In this work, we propose a new algorithm for detecting the indicator of delayed cerebral ischemia from video-EEG monitoring data. The proposed algorithm combines an algorithm for detecting the effect of interchannel time-frequency synchronization of ...
D. Murashov   +3 more
doaj   +1 more source

A detailed analysis of the optical beam deflection technique for use in atomic force microscopy [PDF]

open access: yes, 1992
A Michelson interferometer and an optical beam deflection configuration (both shot noise and diffraction limited) are compared for application in an atomic force microscope.
Jan Greve   +7 more
core   +1 more source

Tapered optical fiber DNA biosensor for detecting Leptospira DNA

open access: yesAsian Pacific Journal of Tropical Medicine, 2023
Objective: To establish a DNA detection platform based on a tapered optical fiber to detect Leptospira DNA by targeting the leptospiral secY gene. Methods: The biosensor works on the principle of light propagating in the special geometry of the optical ...
Jia-Yong Lam   +2 more
doaj   +1 more source

Thin Film Transistor

open access: yesCrystals, 2019
The special issue is "Thin Film Transistor". There are eight contributed papers. They focus on organic thin film transistors, fluorinated oligothiophenes transistors, surface treated or hydrogen effect on oxide-semiconductor-based thin film transistors ...
Ray-Hua Horng
doaj   +1 more source

Study of Energy Scattering Relation and RCS Reduction Characteristic of Matrix-Type Coding Metasurface

open access: yesApplied Sciences, 2018
In this paper, we present a design of the linear polarization conversion metasurface (MS) for the broadband radar cross section (RCS) reduction based on split-ring resonator (SRR) structure in microwave region.
Jia Ji Yang   +3 more
doaj   +1 more source

Visualizing rotation and reversal of the Néel vector through antiferromagnetic trichroism

open access: yesNature Communications, 2022
Antiferromagnets have great promise for use in spin-based electronics; however, detecting the Neel vector is challenging due to the lack of a net magnetization.
Kenta Kimura   +2 more
doaj   +1 more source

Concept for Efficient Light Harvesting in Perovskite Materials via Solar Harvester with Multi-Functional Folded Electrode

open access: yesNanomaterials, 2021
Conventional electrodes in typical photodetectors only conduct electrical signals and introduce high optical reflection, impacting the optical-to-electrical conversion efficiency.
Mao-Qugn Wei   +5 more
doaj   +1 more source

On‐Chip Optical Detection of Viruses: A Review [PDF]

open access: yesAdvanced Photonics Research, 2021
The current outbreak of the coronavirus disease‐19 (COVID‐19) pandemic worldwide has caused millions of fatalities and imposed a severe impact on our daily lives. Thus, the global healthcare system urgently calls for rapid, affordable, and reliable detection toolkits. Although the gold‐standard nucleic acid amplification tests have been widely accepted
Yuzhi Shi   +13 more
openaire   +5 more sources

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