Results 21 to 30 of about 1,953,550 (296)

Dynamical T-matrix theory for high-density excitons in coupled quantum wells [PDF]

open access: yes, 2006
Excitons in coupled quantum wells open the possibility to reach high densities close to equilibrium. In a recent experiment employing a lateral trap potential, a blue shift and a broadening of the exciton emission line has been seen (Snoke, SSC 134). The
Ben-Tabou de-Leon   +6 more
core   +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

Spatial separation of large dynamical blue shift and harmonic generation [PDF]

open access: yes, 2006
We study the temporal and spatial dynamics of the large amplitude and frequency modulation that can be induced in an intense, few cycle laser pulse as it propagates through a rapidly ionizing gas. Our calculations include both single atom and macroscopic
M. V. Ammosov   +4 more
core   +2 more sources

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

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  

EIS/Hinode observations of Doppler flow seen through the 40 arcsec wide slit [PDF]

open access: yes, 2008
The Extreme ultraviolet Imaging Spectrometer (EIS) on board Hinode is the first solar telescope to obtain wide slit spectral images that can be used for detecting Doppler flows in transition region and coronal lines on the Sun and to relate them to their
A.R. Winebarger   +22 more
core   +2 more sources

Doppler shift of hot coronal lines in a moss area of an active region [PDF]

open access: yes, 2012
The moss is the area at the footpoint of the hot (3 to 5 MK) loops forming the core of the active region where emission is believed to result from the heat flux conducted down to the transition region from the hot loops. Studying the variation of Doppler
Dadashi, Neda   +4 more
core   +1 more source

Self-frequency blue-shift of dissipative solitons in silicon based waveguides [PDF]

open access: yes, 2013
We analyze the dynamics of dissipative solitons in silicon on insulator waveguides embedded in a gain medium. The optical propagation is modeled through a cubic Ginzburg-Landau equation for the field envelope coupled with an ordinary differential ...
Biancalana, Fabio   +2 more
core   +2 more sources

Spectrally Stable Blue Light-Emitting Diodes Based on All-Inorganic Halide Perovskite Films

open access: yesNanomaterials, 2022
Substantial progress has been made in perovskite light-emitting diodes (PeLEDs), but the fabrication of high-performance blue PeLEDs still remains a challenge due to its low efficiency, spectral instability and short operational lifetime.
Huidan Zhang   +8 more
doaj   +1 more source

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

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