Results 71 to 80 of about 4,020,412 (320)
Liquid-core low-refractive-index-contrast Bragg fiber sensor [PDF]
, 2011 We propose and experimentally demonstrate a low-refractive-index-contrast hollow-core Bragg fiber sensor for liquid analyte refractive index detection. The sensor operates using a resonant sensing principle- when the refractive index of a liquid analyte in the fiber core changes, the resonant confinement of the fiber guided mode will also change ...
arxiv +1 more source
Advanced Engineering Materials, EarlyView.Hybrid materials enable high‐performance components but are challenging to process. This study explores an inductive heating concept with spray cooling for steel–aluminum specimens in a two‐step process including friction welding and cup backward extrusion.
Armin Piwek +7 more
wiley +1 more source
Why is the refractive index cannot be negative [PDF]
arXiv, 2014 It has been shown that for left-handed metamaterials and generally for negative refraction media the refraction index cannot be entered unequivocally and cannot be considered as real, and especially as negative.
arxiv
Highly tunable refractive index visible-light metasurface from block copolymer self-assembly
Nature Communications, 2016 The refractive index of natural transparent materials is limited to 2–3 throughout the visible wavelength range. Wider controllability of the refractive index is desired for novel optical applications such as nanoimaging and integrated photonics.
J. ·. Kim +11 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.This study explores the use of laser‐induced forward transfer in the picosecond regime to create in vitro biomodels. Focusing on hydrodynamics and rheology, it investigates jet dynamics through time‐resolved imaging, optimizing laser fluence, biological ink viscosity, and printing distance to precisely control the volume and location of bioink ...
Lucas Duvert +5 more
wiley +1 more source
Vacuum measurement of He based on Fabry-Perot cavity and constant pressure reference
Measurement: Sensors, 2021 In order to reduce the uncertainty of the gas refractive index measurement device based on laser interferometry. A measuring method based on constant pressure reference point was proposed.
Wenjie Jia +5 more
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Sensors, 2016 A refractive index sensor based on dual-core photonic crystal fiber (PCF) with hexagonal lattice is proposed. The effects of geometrical parameters of the PCF on performances of the sensor are investigated by using the finite element method (FEM).
Haiyang Wang +4 more
doaj +1 more source
Cell nuclei have lower refractive index and mass density than cytoplasm
Journal of Biophotonics, 2016 Common perception regards the nucleus as a densely packed object with higher refractive index (RI) and mass density than the surrounding cytoplasm. Here, the volume of isolated nuclei is systematically varied by electrostatic and osmotic conditions as ...
M. Schürmann +4 more
semanticscholar +1 more source
Advanced Engineering Materials, EarlyView.Acoustic emissions during direct laser interference patterning are shown to strongly correlate with surface texture depth. By implementing a closed‐loop control system utilizing acoustic feedback, consistent microstructures with uniform depth are achieved despite laser power fluctuations.
Tobias Steege +4 more
wiley +1 more source
Studying Focusing Properties of Graded Index Photonic Crystals Made of Material with Different Refractive Index [PDF]
Journal of Optoelectronical Nanostructures, 2017 In this paper we investigate focusing properties of graded index (GRIN) photonic crystal (PC) structures which are composed of different materials with different refractive indices. GRIN PC structure is constructed from air holes in dielectric background.
Nasrin Miri, Abdolrasoul Gharaati
doaj