Results 31 to 40 of about 1,928,900 (335)

Spectral Shifts of Nonadiabatic High-Order Harmonic Generation

open access: yesApplied Sciences, 2013
High-order harmonic generation (HHG) is a nonlinear nonperturbative process in ultrashort intense laser-matter interaction. It is the main source of coherent attosecond (1 as = 10−18 s) laser pulses to investigate ultrafast electron dynamics.
André D. Bandrauk, Xue-Bin Bian
doaj   +1 more source

Anomalous blue-shift of terahertz whispering-gallery modes via dielectric and metallic tuning

open access: yes, 2019
The vast majority of resonant systems show a red-shift for the resonance frequency when a perturbation, e.g. losses, are introduced to the system. In contrast, here we report for the first time the experimental demonstration of both red- and anomalous ...
Jones, Angus Harvey   +3 more
core   +1 more source

Blue-shifted ancyromonad channelrhodopsins for multiplex optogenetics [PDF]

open access: goldeLife
Abstract Light-gated ion channels from protists (channelrhodopsins or ChRs) are optogenetic tools widely used for controlling neurons and cardiomyocytes. Multiplex optogenetic applications require spectrally separated molecules, which are difficult to engineer without disrupting channel function.
Elena G. Govorunova   +12 more
openalex   +5 more sources

Structural and Optical Properties of Nanocrystalline Pbs Thin Films Prepared by Microwave-Assisted Chemical Bath Deposition

open access: yesEurasian Journal of Science and Engineering, 2022
Nanocrystalline lead sulfide (PbS) thin films have been successfully deposited onto glass substrate via microwave assisted chemical bath deposition.
Muhammed Husham
doaj  

Role of Bi3+ ions on structural, optical, photoluminescence and electrical performance of Cd0.9-xZn0.1BixS QDs

open access: yesSN Applied Sciences, 2021
In this work, the Cd0.9-xZn0.1BixS QDs with different compositions of Bi3+ ions (0 ≤ x ≤ 0.05) were synthesized using a facile chemical route. The prepared QDs were characterized for analyzing the structural, morphological, elemental, optical, band gap ...
A. Krishnamoorthy   +3 more
doaj   +1 more source

Red shift, blue shift: investigating Doppler shifts, blubber thickness, and migration as explanations of seasonal variation in the tonality of Antarctic blue whale song. [PDF]

open access: yesPLoS ONE, 2014
The song of Antarctic blue whales (Balaenoptera musculus intermedia) comprises repeated, stereotyped, low-frequency calls. Measurements of these calls from recordings spanning many years have revealed a long-term linear decline as well as an intra-annual
Brian S Miller   +3 more
doaj   +1 more source

Lattice-induced non-adiabatic frequency shifts in optical lattice clocks

open access: yes, 2010
We consider the frequency shift in optical lattice clocks which arises from the coupling of the electronic motion to the atomic motion within the lattice.
C. E. Moore, K. Beloy
core   +1 more source

Temperature dependent photoluminescence of organic semiconductors with varying backbone conformation [PDF]

open access: yes, 2002
We present photoluminescence studies as a function of temperature from a series of conjugated polymers and a conjugated molecule with distinctly different backbone conformations.
Chandrasekhar, H. R.   +8 more
core   +2 more sources

Defect Modes Generated in a Stack of Spin-Coated Chiral Liquid Crystal Layers

open access: yesCrystals
Nematic chiral liquid crystals (CLCs) are characterized by a helical arrangement of nematic LC molecules. A layer of CLC typically exhibits an optical reflection band due to Bragg reflection in the helical structure.
Frederik Van Acker   +4 more
doaj   +1 more source

Explaining the Gamma-Ray Burst E_peak Distribution [PDF]

open access: yes, 2002
The characteristic photon energy for Gamma Ray Bursts, E_peak, has a remarkably narrow distribution for bursts of similar peak flux, with values between 150 and 600 keV for most faint bursts.
Schaefer, Bradley E.
core   +3 more sources

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