Results 21 to 30 of about 1,830,967 (340)

LHCA4 residues surrounding red chlorophylls allow for fine-tuning of the spectral region for photosynthesis in Arabidopsis thaliana

open access: yesFrontiers in Plant Science, 2023
Improving far-red light utilization could be an approach to increasing crop production under suboptimal conditions. In land plants, only a small part of far-red light can be used for photosynthesis, which is captured by the antenna proteins LHCAs of ...
Xiuxiu Li   +8 more
doaj   +1 more source

Ground Hyper-Spectral Remote-Sensing Monitoring of Wheat Water Stress during Different Growing Stages

open access: yesAgronomy, 2022
Monitoring agricultural drought via ground hyper-spectral remote sensing has always been a hot topic in the fields of agriculture and meteorology.
Qiang Li, Maofang Gao, Zhao-Liang Li
doaj   +1 more source

Retention and Deformation of the Blue Phases in Liquid Crystalline Elastomers [PDF]

open access: yes, 2021
The blue phases are observed in highly chiral liquid crystalline compositions that nascently organize into a three-dimensional, crystalline nanostructure. The periodicity of the unit cell lattice parameters is on the order of the wavelength of visible light and accordingly, the blue phases exhibit a selective reflection as a photonic crystal.
arxiv   +1 more source

Observation of Ultrashort Laser Pulse Evolution in a Silicon Photonic Crystal Waveguide

open access: yesMicromachines, 2021
Using the sum frequency generation cross-correlation frequency-resolved optical gating (SFG-XFROG) measurement setup, we observed the soliton evolution of low energy pulse in an Si photonic crystal waveguide, and it exhibited the pulse broadening, blue ...
Xiaochun Wang   +4 more
doaj   +1 more source

Photoluminescence Revealed Higher Order Plasmonic Resonance Modes and Their Unexpected Frequency Blue Shifts in Silver-Coated Silica Nanoparticle Antennas

open access: yesApplied Sciences, 2019
Higher order plasmonic resonance modes and their frequency blue shifts in silver-coated silica nanoparticle antennas are studied. Synthesizing them with a wet chemistry method, silica (SiO2) nanoparticles were enclosed within silver shells with different
Atta Ur Rahman   +7 more
doaj   +1 more source

Highly efficient XUV generation via high-order frequency mixing

open access: yesNew Journal of Physics, 2020
The efficient generation of the coherent XUV light via frequency conversion of intense laser drivers is a problem of both fundamental and technological importance.
M A Khokhlova, V V Strelkov
doaj   +1 more source

Strain relaxation in InGaN/GaN micro-pillars evidenced by high resolution cathodoluminescence hyperspectral imaging [PDF]

open access: yes, 2012
A size-dependent strain relaxation and its effects on the optical properties of InGaN/GaN multiple quantum wells (QWs) in micro-pillars have been investigated through a combination of high spatial resolution cathodoluminescence (CL) hyperspectral imaging
Chen, Y. J.   +12 more
core   +1 more source

Temperature and Pulse-Energy Range Suitable for Femtosecond Pulse Transmission in Si Nanowire Waveguide

open access: yesApplied Sciences, 2020
We experimentally measured the femtosecond pulse transmission through a silicon-on-insulator (SOI) nanowire waveguide under different temperatures and input pulse energy with a cross-correlation frequency-resolved optical gating (XFROG) measurement setup.
Xiaochun Wang   +4 more
doaj   +1 more source

Blue-light background impairs visual exogenous attention shift

open access: yesScientific Reports, 2023
Previous research into the effects of blue light on visual-spatial attention has yielded mixed results due to a lack of properly controlling critical factors like S-cone stimulation, ipRGCs stimulation, and color.
Chien-Chun Yang   +2 more
doaj   +1 more source

Response of Photonic Hydrogels of Homogeneous Particles to Uranyl Ions in Aqueous Solutions

open access: yesPhotonic Sensors, 2023
We study here the response of photonic hydrogels (PHs), made of photonic crystals of homogeneous silica particles in polyacrylamide hydrogels (SPHs), to the uranyl ions UO 2 2+ in aqueous solutions. It is found that the reflection spectra of the SPH show
R. G. Joshi   +4 more
doaj   +1 more source

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