Track topics on Twitter Track topics that are important to you
The graded bandgap AlxGa1-xAs/GaAs photocathode with graded composition and exponential doping structure has shown great potential for improving photoemission capability. In order to better study the performance of transmission-mode AlxGa1-xAs/GaAs photocathode with the complex graded bandgap structure, the experimental optical properties and quantum efficiency are measured by comparison with uniform composition and exponential doping Al0.7Ga0.3As/GaAs photocathode. The theoretical optical properties of the multilayer AlxGa1-xAs/GaAs photocathode modules are calculated by matrix formula on the basis of thin-film optical principles. The effect of cathode thickness and aluminum proportion on optical properties are analyzed by simulation. The results show that these parameters have complicated effects on the optical properties. Different parameters are presented as the changes of peak and valley of the optical property curves. Meanwhile, the emission layer has a significant effect on the absorptivity values of the photocathode modules, which will obviously influence photoemission performance. By using the optical properties via calculation, a better fit of the experimental data with the theoretical model can be achieved, which would make reasonable guidance for further investigation of these complex graded bandgap photoemitters.
This article was published in the following journal.
Name: Applied optics
CdSexTe1-x semiconductor nanocrystals (NCs), being rod-shaped/irregular dot-shaped in morphology, have been fabricated via a simple hot-injection method. The NCs composition is well controlled through...
Multimode interferometers based on the single-mode-no-core-single-mode fiber (SNCS) structure have been widely investigated as functional devices and sensors. However, the theoretical support for the ...
Energy bandgap largely determines the optical and electronic properties of a semiconductor. Variable bandgap therefore makes versatile functionality possible in a single material. In layered material ...
A mechano-/photo- bi-catalyst of piezoelectric-ZnO@photoelectric-TiO2 core-shell nanofibers was hydrothermally synthesized for Methyl Orange (10 mg L(-1)) decomposition. The mechano-/photo- bi-catal...
Elliptical-core few mode fiber (EC-FMF) is used in a mode division multiplexing (MDM) transmission system to release multiple-input-multiple-output (MIMO) digital-signal-processing, which reduces the ...
The study investigates the performance of a new dialyzer (Theranova 400) containing a membrane with increased pore sizes. The performance will be determined by the removal of middle molecu...
Consistent data suggest that neuromuscular transmission is impaired in ALS patients. Neuromuscular junctions dysfunction may appear very early in the disease, as shown by data in animal mo...
A two period pilot study to determine if a graded glucose infusion using a glucose (20% dextrose [D20]) intravenous infusion can be properly implemented and will be well tolerated in heal...
The primary aim of the study is to investigate personal attitudes regarding mode of delivery among both medical health care professionals and non-professionals. We are also investigating w...
Suboptimal use of medications among geriatric patients is well-known problem and leads to medication errors, re-hospitalizations and death. By using a randomized controlled trial (RCT) des...
The transmission of infectious disease or pathogens. When transmission is within the same species, the mode can be horizontal or vertical (INFECTIOUS DISEASE TRANSMISSION, VERTICAL).
A guanidinium antihypertensive agent that acts by blocking adrenergic transmission. The precise mode of action is not clear.
The physical characteristics of the body, including the mode of performance of functions, the activity of metabolic processes, the manner and degree of reactions to stimuli, and power of resistance to the attack of pathogenic organisms.
The study of the energy of electrons ejected from matter by the photoelectric effect, i.e., as a direct result of absorption of energy from electromagnetic radiation. As the energies of the electrons are characteristic of a specific element, the measurement of the energy of these electrons is a technique used to determine the chemical composition of surfaces.
Prospective risk assessment tool aimed at identifying potential risks and their impact in healthcare settings.